CIPS L4M3 Commercial Contracting Exam Practice Test

An implied term is a term which the courts imply into a contract because it has not been expressly included by the parties. This may be because the parties did not consider it, did not think that any problem would arise in relation to it or simply omitted to include it.

The courts are very reluctant to imply terms into contracts and will only do so in the following circumstances:

- terms implied under statute

- terms implied under common law

- terms implied because of custom or usage

- terms implied due to previous dealings

- terms implied ‘in fact’ or to reflect the parties’ intentions

Benefits for the purchaser in using call off contract are as below:

- The benefit of a call off contract is that they allow the supply of materials, goods and services to be secured over multiple delivery dates across the length of a project.

- Agreed prices, either fixed or pre-agreed mechanism for adjustment. This helps with setting and controlling budgets.

- Simple order mechanisms at the point of need

- Schedules of rates pricing enables electronic procure-to-pay systems, which gives greater control and visibility of spend

- The value of spend ad length of contract justify the cost of proper market engagement and tender or negotiation processes resulting in better value for money

- The longer the contract, the greater the opportunities for aligning working practices to create joint efficiency.

Liquidated damages are an amount of money, agreed upon by the parties at the time of the contract signing, that establishes the damages that can be recovered in the event a party breaches the contract. The amount is supposed to reflect the best estimate of actual damages when theparties sign the contract. These usually apply to a specific type of breach, and in construction, it is frequently the failure to complete work on time.

Liquidated damages clauses are usually written as some sort of formula, for example:

Total Contract Price – [(X amount of $ per day) x (number of days late)]

Including a liquidated damages clause can provide many benefits, the most important of which ispredictability. When setting a predetermined amount of damages, it allows both parties a chance to negotiate and settle on a number they both feel is fair and reasonable.

From the owner’s perspective, this acts like a cheap form of insurance against your contractors. In the event of a breach, the owner can immediately calculate the damages without going through the trouble of proving actual damages. Proving actual damages can be a complicated, lengthy, and costly process.

From a contractor perspective, this allows them to analyze the level of risk involved, and schedule appropriately. It also allows them the opportunity to limit the damage claims of the owner.

A guarantee is an agreement given by a trader to a consumer, without any extra charge, to repair, replace or refund goods that do not meet the specifications set out in the guarantee. A guarantee is usually issued by the manufacturer of goods or by a trader that provides goods as part of a service - replacement windows, for instance. Generally, a guarantee provider undertakes to carry out free repairs, for a set period of time, for problems that can be attributed to manufacturing defects.

Express terms are the terms of the agreement which are expressly agreed between the parties. Ideally, they will be written down in a contract between the parties but where the contract is agreed verbally, they will be the terms discussed and agreed between the parties.

Implied terms are terms implied into the contract by the courts. They are not expressly set out in the contract but are taken to be as effective as if they were and as if they had been included from day one of the contract. The express terms and any implied terms together create the legally binding obligations on the parties.

KPIs and the targets for supplier should be SMART:

- Specific: What exactly do you want to achieve?

- Measurable: How will you identify that you have achieved your goal?

- Achievable: Is your goal really attainable?

- Relevant: Is it relevant to you or, in other words, does it align with where you want to be?

- Time-bound (or timely): When will you deliver your goal, and what are the key milestones?

The two KPIs (Delivery in one hour, Return orders in one hour) are not realistic and achievable for international suppliers. Therefore, you should not put such high targets for supplier.

According to USLegal Inc, fitness for purpose refers to the standard that must be met by a seller in the course of a business. Generally, when a buyer makes known to a seller the particular purpose for which the goods are bought, there is an implied condition that the goods are reasonably fit for that purpose (customer's requirements, needs, or desires). Specification is the ground for deciding whether goods received are fit for purpose.

We already know that there are two types of specifications: conformance and performance specifications. With conformance specification, the buyer lists out technical requirements to which the goods must conform. Lacking of any requirement may be enough for the goods to be unfit. On the other hand, if performance specification is in use, the goods must be fit for specific outputs that buyer has listed in the specification.

Providing the 'fit for purpose' goods is one of the fundamental obligations of seller in sale contract. Unfulfilling this obligation would lead to legal consequences. If the goods are unfit for purpose, seller may have to:

- replace the non-conforming goods

- pay the damages to the buyer

Where the sale of goods is between two businesses in different Contracting States, then it is international and the CISG rules of law automatically apply unless they have been excluded. A contract clause stating that the contract is subject to the legal systems and courts of a particular country overrides or excludes the CISG rules, since the local rules of that country would apply instead.

So the answer should be Canada's legal system.

Information Assurance (IA)

Information Assurance (IA) is the practice of managing information-related risks and the steps involved to protect information systems such as computer and network systems. The IA transformation is a partnership that stretches across the Department of Defense (DoD), Office of National Intelligence, Committee on National Security Systems, National Institute of Science and Technology (NIST), and the Office of Management and Budget.

The US Government's definition of information assurance is:

“measures that protect and defend information and information systems by ensuring their availability, integrity, authentication, confidentiality, and non-repudiation. These measures include providing for restoration of information systems by incorporating protection, detection, and reaction capabilities.”

Information Assurance (IA) is essentially protecting information systems, and is often associatedwith the following five pillars:

- Integrity

- Availability

- Authentication

- Confidentiality

- Nonrepudiation

The following pillars can be applied in a variety of ways, depending on the sensitivity of the information, or information systems within your organization. Currently, these five pillars are used at the heart of the US Governments ability to conduct safe and secure operations in a global environment.

1. Integrity

Integrity involves assurance that all information systems are protected and not tampered with. IA aims to maintain integrity through means such as anti-virus software on all computer system, andensuring all staff with access to know how to appropriately use their systems to minimize malware, or viruses entering information systems.

2. Availability

Availability simply means those who need access to information, are allowed to access it. Information should be available to only those who are aware of the risks associated with information systems.

3. Authentication

Authentication involves ensuring those who have access to information, are who they say they are. Ways of improving authentication involve methods such as two-factor authentication, strong passwords, bio-metrics and other devices. Authentication may also be used to not only identify users, but also other devices.

4. Confidentiality

IA involves the confidentiality of information, meaning only those with authorization may view certain data. This step is closely mirrored by the six data processing principles of the General Data Protection Regulation (GDPR), where by personal data must be processed in a secure manner "using appropriate technical and organizational measures" ("integrity and confidentiality").

5. Nonrepudiation

The final pillar simply means someone with access to your organizations information system cannot deny having completed an action within the system, as there should be methods in place to prove that they did make said action.

Model form contracts are pre-standardised agreements used across industries to bring consistency, clarity, and fairness to commercial relationships. They are particularly beneficial in complex sectorslike construction and engineering where industry-accepted templates like NEC, JCT, or FIDIC are widely used.

When parties do not negotiate face-to-face, a key QUESTION NO: becomes when things like acceptances, rejections and revocations take effect. The general rule is that acceptances are effective on dispatch (when they are mailed). Everything else becomes effective when the offeror actually receives them. This idea is codified by the “mailbox rule” which states that acceptance is effective on dispatch, even before the offeror has received it. (The one minor exception to this rule involves option contracts for which acceptances are not effective until they are received by the offeror.)

Developing and using generic specifications is as import in the sustainable procurement process as it is in the traditional procurement process. During this stage, human/labour rights and environmental performance criteria should be translated into specifications that meet specific requirements of the specified outcome, desired by the procurement action.

The specification stage is key to all types of contract. Building in environmental and social considerations at this early stage, provides a clear indication to suppliers that sustainability is important to the UN organization. Consider available alternatives which are less environmentally and socially damaging. Consider all the phases of a product’s life cycle (e.g. production, transportation, maintenance, disposal, etc) when determining its cost and environmental impact. Assess the overall environmental and social integrity of suppliers by looking at their policies and practices.

Specifications which are output-based rather than input-based can increase supplier innovation, reduce waste and minimise harmful social and environmental impacts.

The request for quotations is a procurement method that is used for small value procurements of readily available off-the-shelf goods, small value construction works, or small value services procurements. Request for quotations works best under a framework agreement

This procurement method is also known as invitation to quote and shopping, and it does not require the preparation of tender documents to the same extent as open tendering, request for proposals or two-stage tendering.

Among 4 options:

- "Purchase of a small number of standardised products under a framework agreement": the products are standardised and there is a framework agreement in place, so RFQ is the best solution.

- "Purchase of complex machinery": Complex machinery is often a large purchase. Furthermore, suppliers' quality may vary. So RFQ is not suitable, instead, depending on the situation, buyer may opt ITT or RFP to purchase this type of machinery.

- "Design of a unique and complex software code": Unique and complex software is not off-the-shelf, thus RFQ is not suitable.

- "When the buying organisation does not know the requirements in details and needs the input from suppliers": When the detailed requirements are unknown, the best solution is request for proposal or developing dialogue with suppliers.

Number of on-time deliveries can be quantified, then numerical measures can be applied.

Frequency of on-time deliveries is measured as on-time deliveries as a percentage of total no. of deliveries for period.

LO 2, AC 2.2

Price adjustment formulae are typically tied to objective, external indices such as fuel prices, labour rates, or commodity costs. Rising fuel costs directly affect logistics and production expenses and are a legitimate reason to activate such clauses.

A well-drafted service specification includes a clear description of the services to be delivered, fault rectification timelines, and the duration of service. These define scope, performance expectations, and timelines. Evaluation methodology and contract terms are important, but they are part of separate procurement or contractual documentation.

A lease is a contractual arrangement calling for the lessee (user) to pay the lessor (owner) for use of an asset. Some characteristics of Leases are:

- The right to use the lessor’s asset is granted in exchange for a fee called the lease payment.

- The lease payments are usually paid in installments.

- Leases may be long- or short-term.

- At its inception a lease agreement constitutes a mutually unperformed contract

Though the ownership of the asset is not transferred to the lessee, some responsibilities and risks do. The lessor and lessee may negotiate on who is responsible on maintenance, insurance, etc.

The most usual forms of insurance cover are as below:

- Employer's liability: Employers' liability insurance, sometimes known as employment practices liability insurance (EPLI), protects employers from financial loss if a worker has a job-related injury or illness not covered by workers' compensation. Employers' liability insurance can be packaged with workers' compensation insurance to further protect companies against the costs associated with workplace injuries, illnesses, and deaths. Employers' liability insurance is also called “part 2” of a workers’ compensation policy.

- Public/product liability: Public liability insurance covers you against any claims made against your business – for example if you were held legally liable for personal injury, or for damage done to property. The insurance will also cover you for any legal costs associated with defending claims against your business.

- Professional indemnity insurance (PII): Professional indemnity or liability insurance offers such coverage to professional advice or service providing individuals and companies ensuring protection against any legal costs and damages awarded as a result of claims relating to negligence. Whereas more general forms of liability insurance focus on direct forms of harm such as sustaining injuries, professional indemnity insurance provides a far more detailed and comprehensive form of coverage. The cover protects a firm or individual's liability relating to any financial loss caused by errors or omissions in the service provided as well as any alleged failure to perform on behalf of a client.

- Goods in transit coverage: Goods in transit insurance, sometimes referred to as GIT, covers goods against loss or damage while being moved from one place to another. These goods can be being carried by individuals in their own vehicle, self employed drivers or contractors or by third party carriers. The insurance can cover both domestic and international trips, with specific add-ons available for insurance within Europe.

An implied term is a term which the courts imply into a contract because it has not been expressly included by the parties. This may be because the parties did not consider it, did not think that any problem would arise in relation to it or simply omitted to include it.

The courts are very reluctant to imply terms into contracts and will only do so in the following circumstances:

1. terms implied under statute

2. terms implied under common law

3. terms implied because of custom or usage

4. terms implied due to previous dealings

5. terms implied ‘in fact’ or to reflect the parties’ intentions

One-off contracts are used where a supplier is only needed for a single activity unlikely to be repetitive, and where the need of the buyer is concrete and finite. Among the answers, only construction for power plant is one-off since the work is non-repetitive and the need is clearly defined.

A framework agreement is an agreement between one or more businesses or organisations, "the purpose of which is to establish the terms governing contracts to be awarded during a given period, in particular with regard to price and, where appropriate, the quantity envisaged".

A Commercial Lease Agreement is a contract used when renting business property to or from another individual or company. It gives the tenant (or renter) the right to use the property for business purposes during the term of the lease in exchange for payment to the landlord.

A franchise agreement is a legally binding document that outlines a franchisor's terms and conditions for a franchisee. Every franchise is governed by these terms, which are generally outlined in a written agreement between both parties.

Effective KPIs must be SMART: specific, measurable, achievable, relevant, and time-bound. "Effort exerted" is vague and not objectively measurable, making the KPI unsuitable. A better KPI would involve actual cost data or variance against a defined budget.

Supplier performance management and monitoring is a fundamental part of contract management. It starts with setting KPIs, targets and consequences or actions that arise from KPI scores. The measures, objectives and targets used in the monitoring of the supplier’s performance must reflect those that were agreed when the contract was let. That is why it is important to specify a commitment to continuous improvement at the outset. It would be unfair to the supplier to suddenly introduce a range of measures after the contract had begun - however if such an introduction mid-term through the contract is unavoidable then it should be negotiated and agreed in a professional manner and not merely imposed on the supplier.

In conclusion, the details of how KPIs will be monitored and the actions or consequences resulting from scores achieved must be documented and agreed between the parties. This details may be embedded in the specification or the main body of the contract or it may be set out in a SLA.

Scoping specifications are fundamental in the development of a contract as they define the requirements, standards, and expectations for the goods or services to be provided. This clarity ensures that both parties have a mutual understanding of the deliverables, which is essential for a legally binding agreement. While contract management and supplier management are critical post-contract award activities, and budget approval is an internal process, scoping specifications directly contribute to the contract's formation.

This scenario is in fact based on a famous case law: Dunlop Pneumatic Tyre Company v New Garage & Motor co [1915] AC 79. In this case law, the House of Lords identified the clause as liquidated damages, and therefore enforceable.

However, if this case had happened in 2015 or afterwards, there would be some legal issues:

- The price agreement is prohibited by Competition Act 1998

- If the agreement is allowed by Competition Act, as in the case Cavendish Square Holding BV (Appellant) v Talal El Makdessi (Respondent), the clause can also be identified as a penalty and it is still enforceable.

Under the Sale of Goods Act and other applicable legislation, goods must be of satisfactory quality, fit for purpose, and as described. Perishable goods arriving in a spoiled state would not meet the standard of satisfactory quality, even if sold by sample or description. This is an implied term that protects the buyer.

A service-level agreement (SLA) defines the level of service you expect from a vendor, laying out the metrics by which service is measured, as well as remedies or penalties should agreed-on service levels not be achieved.

According to CIPS L4M3 study guide, SLA should cover the following:

- KPIs

- How the measurements convert into scores

- Any other service level standards

- Minimum acceptable standards or scores in each case

- Range of scores both above and below the minimum acceptable

- Any mitigating factors which might apply in the event of poor performance

- Any time period permitted in which to remedy a situation of poor performance

- Remedies available

- Dispute settlement

- How to deal with inconsistencies or conflicts between KPIs and any other documents.

In IT service (such as in the scenario), the SLA often covers:

- Uptime

- Call metrics

- Customer satisfaction

- Turn around time

- Quality

- Mean time to recovery

- Mean time between failure

- Backlog

- Business results

You can read the details of above indicators here.

ISO standards are internationally agreed by worldwide experts. They overcome countries' differences and facilitate global trade. If a buying organisation is sourcing globally, they should use ISO standards within the specification.

Advantages of using fixed pricing arrangement are as below:

- Budget/income certainty - prices are fixed up front and should not change

- The impact of changes to the supplier's cost base is not fed through to the purchaser. If costs diminish, the supplier will benefit from this, and if costs rise, the purchaser will benefit

Article 2 of CISG states that:

This Convention does not apply to sales:

(a) of goods bought for personal, family or household use, unless the seller, at any time before or at the conclusion of the contract, neither knew nor ought to have known that the goods were bought for any such use;

(b) by auction;

(c) on execution or otherwise by authority of law;

(d) of stocks, shares, investment securities, negotiable instruments or money;

(e) of ships, vessels, hovercraft or aircraft;

(f) of electricity.

LO 1, AC 1.2

Express terms are the terms of the agreement which are expressly agreed between the parties. Ideally, they will be written down in a contract between the parties but where the contract is agreed verbally, they will be the terms discussed and agreed between the parties.

Implied terms are terms implied into the contract by the courts. They are not expressly set out in the contract but are taken to be as effective as if they were and as if they had been included from day one of the contract. The express terms and any implied terms together create the legally binding obligations on the parties.

Direct call off is the act of placing an order under a framework agreement without having further competition.

Standing offer is an available offer.

Blanket order is another name of framework agreement

Closed system is a requirement of framework agreement. It is a system or process that, once started, does not allow new entrants.

Industry model contracts are pre-written templates that include widely accepted terms. They save time and legal costs during contract development and are generally written to be neutral or fair toboth parties. They do not remove the need for buyers to understand the terms and are not necessarily highly flexible.

- A call off or a term contract is one which exists for a fixed period of time, rather than for a specific purpose

- A formal framework agreement does have some legal standing but it is not a contract, primarily because there is no consideration involved, but it is an overarching (or umbrella) agreementunder which contracts can be created (this holds true in English law but may not be right in other jurisdiction)

- A framework arrangement is a rather loose set-up, without any legal standing. It usually occurs when an organisation has decided for itself to limit the number of suppliers it is willing to work with and, through a purely internal process, sets up an approved list of such suppliers.

- A performance management framework including KPIs and targets, the assessment scheme and incentives, disincentives, bonuses and penalties. It is a schedule to a contract and only legally binding if it is referred from contract clauses.

Liquidated damages, also referred to as "liquidated and ascertained damages" (LADs) are damages whose amount the parties designate during the formation of a contract[2] for the injured party to collect as compensation upon a specific breach (e.g. late performance). In supply contracts and work contracts, the liquidated damages clause often take form as known damages to be paid per day delayed. Number 1 and 2 are examples of this clause.

GHS stands for the Globally Harmonized System of Classification and Labelling of Chemicals. GHS defines and classifies the hazards of chemical products, and communicates health and safety information on labels and safety data sheets). The goal is that the same set of rules for classifying hazards, and the same format and content for labels and safety data sheets (SDS) will be adopted and used around the world. An international team of hazard communication experts developed GHS.

The Global Positioning System (GPS), originally NAVSTAR GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocationand time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. Obstacles such as mountains and buildings block the relatively weak GPS signals.

CODEX STAN 1-1985 is general standard for the labelling of packaged goods.

Environment (E), health (H) and safety (S) (together EHS) is a discipline and specialty that studies and implements practical aspects of environmental protection and safety at work. In simple terms it is what organizations must do to make sure that their activities do not cause harm to anyone.

Service credits are financial compensations provided to the buyer when the supplier fails to meet the agreed-upon service levels outlined in the SLA. They serve as a remedy for underperformance. Service guarantees are commitments to meet certain standards, service standards define the expected level of service, and service schedules outline the timing of service delivery, but none directly compensate the buyer for service failures.

Consideration only appears in common law countries. Below are some examples of what is and what is not consideration:

- Past consideration is something that has already been done or given. This cannot act as consideration

- Implied consideration: if the detail of a promise to pay is expressed after the provision of goods or services, but there is an implication that such promise would be forthcoming, this may (depending on the facts) be valid consideration.

- A promise given to a third party: this is not normally consideration, and is based on a concept known as privity of contract. Anyone who is not a party to the contract, even if they are beneficiary of it, cannot sue if the terms of the contract are breached.

- A promise to perform over and above an existing obligation: This is always consideration

There are two main types of specification: performance specification and conformance specification (sometimes called prescriptive or technical specifications).

A conformance specification establishes the characteristics a commodity must possess, including details of how the commodity will be manufactured; engineering plans, drawings, or blueprints may be included. The design specification states in prescriptive terms what the potential offeror must provide to the buyer.

Conformance specifications have following features:

- Focus on inputs

- Give specific method, processes and materials

- May identify specific manufacturers or components

- The 'how' as well as the 'what'

- Ties supplier to set details

In a 'battle of the forms', both buyer and supplier exchange documents with conflicting terms. The general rule is that the terms of the last document exchanged before performance (e.g., delivery or payment) that is not objected to will govern the contract. An order acknowledgement from the supplier with its own terms, followed by acceptance (e.g., payment), usually constitutes the final word.

Express terms are the terms of the agreement which are expressly agreed between the parties. Ideally, they will be written down in a contract between the parties but where the contract is agreed verbally, they will be the terms discussed and agreed between the parties.

Implied terms are terms implied into the contract by the courts. They are not expressly set out in the contract but are taken to be as effective as if they were and as if they had been included from dayone of the contract. The express terms and any implied terms together create the legally binding obligations on the parties.

Express terms are explicit and will normally override implied terms unless the implied term is created by statute and the law states that it cannot be overridden.

One of the major disadvantages of tendering process is that it is lengthy, bureaucratic and slow. To reduce the preparation time, buying organisation can:

- Plan forward

- Standardise tendering documents (such as notices, terms and conditions,...) whenever possible

- Train procurement staff

- Write down policies for tender-waiver

Buying organisation should not eliminate the pre-qualification stage from all tendering processes. This stage is used as a filter to select the most competent suppliers for next stage in restricted tendering. To save time in this process, you can design a model questionnaire.

Early market engagement is encouraged in procurement best practices. It helps procurement teams understand new technologies, identify capable suppliers, and inform the development of effective specifications and contract terms. However, it must be non-binding and conducted fairly to ensure no supplier gains an unfair advantage.

In the scenario, the contract between the company and its suppliers is continuous rather than one-off. So it cannot be one-off contract or spot purchase. The quantity and time is well known and fixed, this type of contract is known as call-off contract or blanket order.

Referencing recognised international standards like ISO 27001 in specifications ensures that all potential suppliers understand and meet a uniform set of expectations regarding data security. This not only promotes consistency but also reduces the burden on the buyer to evaluate varied, incompatible approaches.

There are 3 types of KPI measure:

- Binary KPIs

- Quantitative KPIs (or numerical)

- Qualitative KPIs

User satisfaction is subjective, therefore, using qualitative assessment is the best answer.

Regarding rule of offer and acceptance, there are some differences among legal system around the world. For example, mailbox rule is generally applied in common law countries such as UK, US, Australia,.. while it is ignored in civil law countries. To clarify on rule of offer and acceptance in international trade, offerors may use expressed terms in their offers. These terms known as deemed receipt protocol.

The contract provision that relieves the parties from performing their contractual obligations when certain circumstances like natural disasters, terrorist attacks, etc arise is called Force majeure. Force majeure is an example of exclusion clause.

An exemption clause in a contract is a term which either limits or excludes a party’s liability for a breach of contract. In order for an exclusion clause to be binding and operable upon the parties, the clause must:

1. The clause must be incorporated into the contract as a term.

2. The clause must pass the test of construction.

3. The clause must not be rendered unenforceable by the statutory provisions in the Unfair Contract Terms Act 1977 or the Consumer Rights Act 2015 (enacting the Consumer Rights Bill 2013-14).

The organisation should have an overarching strategies or policies which sets out the social and environmental objectives to be pursued via procurement and the supply chain generally. Some of these will be about the specification, but that must be tied in other aspects of the sourcing strategy. These objectives, policies and strategies can be found in corporate social responsibility policy.

The five essential elements of a valid contract are: offer, acceptance, consideration (something of value exchanged), capacity (legal ability to contract), and correct form (in writing if required). These ensure that contracts are legally enforceable and binding.

An insurance policy transfers a risk from one party to another in exchange for payment, it does not transfer the liabilities from the insured to insurer.

Insurance policies are taken out as a form of protection against a specific risk or unfortunate occurrence. If one party indemnifies another to protect that other party in the event of a risk occurring then the indemnity itself is merely a statement of intent. There also need to be some mechanism of substance to back up that indemnity. This BACK UP is the insurance policy which can be relied upon to meet the indemnity being given. In fact, most indemnity provisions are backed up by insurance coverage.

Professional indemnity or liability insurance offers such coverage to professional advice or service providing individuals and companies ensuring protection against any legal costs and damages awarded as a result of claims relating to negligence. Whereas more general forms of liabilityinsurance focus on direct forms of harm such as sustaining injuries, professional indemnity insurance provides a far more detailed and comprehensive form of coverage. The cover protects a firm or individual's liability relating to any financial loss caused by errors or omissions in the service provided as well as any alleged failure to perform on behalf of a client.

Goods in transit insurance does what it says on the tin, protecting any goods your business delivers or transports from place to place. The responsibility to pay the insurance premium is negotiable, it may belong to the supplier or the buyer.

Normally in a price adjustment agreement, the supplier is allowed to change price based on an indexation, which is published by a third party (for example, government or exchange market). The selected indices often associate with input materials of supplier. For instance, the plastics manufacturer may adjust their price based on crude oil price as oil is major input of producing plastics. Other suppliers may select different set of indices, such as Producer Perception Index.

In this question, only 'Rise in fuel price' could be a justification for supplier to increase price because:

- It may affect the input material price

- The index is checked and published by an independent third party.

An invitation to treat is a legal concept that refers to an indication that a party is open to receiving offers, but it is not an offer in itself. Common examples include advertisements, display of goods in shops, or issuing a tender. It invites others to make offers, which may or may not be accepted.

An offer is a full statement of what the offeror is willing to provide and the terms by which they are willing to provide it.

There are some statements that are not offers:

- Invitation to treat: this states that a person or organisation is willing to enter into discussions about the possibility of a deal, but does not confirm a willingness to be bound by any terms mentioned. Catalogues, goods on display and ITTs are invitation to treat.

Civil law countries may have different perspective on this matter. Article 2:201 (3) of The Principles of European Contract Law states: 'A proposal to supply goods or services at stated prices made by a professional supplier in a public advertisement or a catalogue, or by a display of goods, is presumed to be an offer to sell or supply at that price until the stock of goods, or the supplier's capacity to supply the service, is exhausted.' Learners are advised to look at their countries' legislation for more information on offer and acceptance.

- Declaration of intention: this is defined as an aim or a plan.

- A 'mere puff' (or boast): this is anything which is not intended to be taken literally or seriously, such as many advertisement.

- Provision of information: merely provides information, but provider does not confirm willingness to be bound.

Consideration is one thing given in exchange for another.

In this case, considerations of customers are three wrappers and 1s6d. Consideration of Nestle is Rockin' Shoes record or a voucher.

Incentivised pricing is designed to motivate suppliers to meet or exceed performance targets by providing financial or other incentives. In urgent projects, such as constructing a hospital ward during a pandemic, incentivised pricing encourages suppliers to accelerate delivery without compromising on quality. This supports the buyer’s need for speed and reliability.