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A Levelaccounting · Topic 17

Accounting Paper 2 Topic 17: Marginal Costing & Decision Making

Practice Cambridge exam questions on make-or-buy, special order pricing, and product discontinuation.

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About Marginal Costing & Decision Making

Marginal Costing and Decision Making covers the application of incremental and differential cost analysis to guide short-term management decisions, including accepting special orders, make-or-buy choices, adding or discontinuing products, and temporary shutdown options.

Why Is Marginal Costing Essential for Decisions?

In the short term, fixed costs are unavoidable sunk costs; decisions should therefore be evaluated based on the positive contribution generated above relevant variable costs. In Cambridge Paper 2, examiners test quantitative differential cost calculations accompanied by qualitative business considerations.

Skills Tested In This Topic

Candidates must evaluate special export orders at discounted prices (using spare capacity), compare internal manufacturing costs against external supplier quotes (make-or-buy), assess whether to close unprofitable departments by analyzing specific avoidable fixed costs, and evaluate non-financial factors (quality, reliability, employee morale).

How This Topical Paper Helps

Solving topic-wise past paper questions from 2011 to 2024 trains students to distinguish relevant from irrelevant costs and write balanced multi-paragraph management advice incorporating quantitative and qualitative reasoning.

Exam Preparation Tips

A special order is financially acceptable if the offered price exceeds variable cost per unit and incremental fixed costs, provided spare capacity exists. Always discuss qualitative risks such as existing customer backlash or supplier reliability.

Why Practice Past Paper Questions?

Authentic Cambridge structured questions contain comprehensive 8-to-12 mark scenario-based evaluation questions that test both financial calculations and critical business judgment.

Quick Answer

Marginal Costing for Decision Making evaluates short-term business choices-such as accepting special orders, make-or-buy, and closing unprofitable segments-based on relevant marginal costs and positive contribution. Students should revise by calculating incremental contribution and writing balanced evaluations considering non-financial factors for Cambridge Paper 2.

How To Revise Using This Paper

  • Review definitions of relevant costs, avoidable fixed costs, sunk costs, and opportunity costs.
  • Practice calculating incremental contribution for make-or-buy and special order scenarios.
  • Master the technique of analyzing departmental profits before and after fixed cost reallocation.
  • Solve all structured decision-making questions in this topical PDF under timed conditions.
  • Check financial figures and written justifications against official Cambridge mark schemes.
  • Re-attempt evaluative narrative sub-questions, ensuring both financial and non-financial points are argued.

Summary

Marginal Costing and Decision Making encompasses using contribution analysis to resolve short-term operational choices such as make-or-buy, special order acceptance, and product discontinuation. Revision should focus on isolating relevant variable costs, identifying avoidable fixed overheads, and synthesizing quantitative findings with qualitative considerations. Topical past paper practice ensures high-scoring written evaluations and calculations on Cambridge Paper 2.

Frequently Asked Questions

Fixed costs are typically sunk and unavoidable in the short term, meaning they will be incurred regardless of the decision made, making only variable costs and incremental fixed costs relevant.

A special order should be accepted if the offered price exceeds the variable cost per unit (generating positive contribution), spare factory capacity exists, and regular customer prices are not compromised.

If the external purchase price is less than the internal marginal cost of making (plus any avoidable fixed costs), the company should buy; otherwise, it should make internally.

No. If the product generates a positive contribution toward unavoidable general fixed costs, discontinuing it would cause overall business profit to fall by the amount of lost contribution.

Avoidable (specific) fixed costs are overheads directly associated with a specific department or product (e.g. specialized machinery lease) that will cease if that department is discontinued.

Non-financial factors include: external supplier quality consistency, delivery reliability, loss of proprietary expertise, supplier price hikes in future, and redundancy impacts on staff morale.

Opportunity cost is the financial benefit foregone by choosing one alternative over the next best available alternative (e.g. lost contribution from regular sales when taking a special order).

Common mistakes include treating total fixed overheads as avoidable, forgetting to evaluate non-financial implications, and failing to provide a clear justified final recommendation.

Dedicate four to five structured revision sessions practicing multi-scenario contribution worksheets and drafting comprehensive 8-to-12 mark evaluative essays.

Yes. The topical PDF compiles official Cambridge 9706 Paper 2 questions with complete mark scheme solutions for self-paced revision.