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A Levelaccounting · Topic 21

Accounting Paper 1 Topic 21: Marginal Costing & Decision Making

Practice Cambridge exam questions on special orders, make or buy choices, and shutdown decisions.

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About Marginal Costing & Decision Making

Marginal Costing & Decision Making covers applying marginal costing principles and relevant cost analysis to evaluate special orders, make-or-buy decisions, and product line discontinuations.

Why Is Decision Making Important?

Management must make routine short-term operational choices that maximize total contribution. Cambridge Paper 1 tests candidates on distinguishing relevant variable costs from committed fixed costs in decision-making contexts.

Skills Tested In This Topic

Students must evaluate special order pricing (accepting orders above marginal cost when spare capacity exists), perform make-or-buy comparative cost analysis, evaluate whether to close an unprofitable department or product line, and determine the profit impact of price changes.

How This Topical Paper Helps

Solving past Cambridge MCQs from 1999 to 2024 trains students to isolate avoidable costs from unavoidable allocated fixed overheads and calculate the exact financial impact of management decisions.

Exam Preparation Tips

Never allocate general fixed costs to special order decisions unless fixed costs specifically increase due to the order. A product line should only be discontinued if its revenue is less than its avoidable variable and specific fixed costs.

Why Practice Past Paper Questions?

Cambridge multiple-choice questions test subtle distinctions between incremental revenues and unavoidable overheads designed to trip up students relying on full absorption cost figures.

Quick Answer

Marginal Costing for decision making focuses on incremental revenues and avoidable variable costs, ignoring sunk and unavoidable fixed overheads. Key decision scenarios include special orders (accept if price > marginal cost with spare capacity), make or buy (buy if purchase price < incremental variable cost to make), and discontinuing products (close only if contribution is negative). Students should revise by practicing relevant costing comparisons.

How To Revise Using This Paper

  • Master the decision rules: accept special orders if incremental revenue exceeds incremental variable costs.
  • Practice Make-or-Buy calculations comparing supplier price against internal marginal manufacturing cost.
  • Learn how to evaluate product discontinuation: check if the product yields positive contribution towards fixed costs.
  • Solve all multiple-choice questions in this topical past paper under timed conditions.
  • Mark answers using official Cambridge mark schemes and review reasons for any fixed cost allocation errors.
  • Review qualitative factors alongside financial calculations before sitting your examination.

Summary

Marginal Costing & Decision Making applies contribution analysis to short-term business choices such as special orders, make-or-buy options, and product line closures. Revision should focus on relevant incremental costs, ignoring allocated fixed overheads, and identifying positive contribution opportunities. Practicing topical past paper questions ensures speed and maximum marks on Cambridge Paper 1 MCQs.

Frequently Asked Questions

Marginal Costing evaluates short-term business decisions by analyzing variable costs and contribution, ignoring fixed costs that remain unchanged regardless of the decision made.

Short-term decision making is heavily tested in Cambridge Paper 1 MCQs. Questions evaluate special order pricing, make-or-buy choices, discontinuing unprofitable product lines, and equipment replacement options.

It is moderately challenging because multiple-choice questions often include sunk costs, committed costs, and opportunity costs designed as distractors to test conceptual precision.

Revise by focusing on relevant costing rules: evaluate decisions based purely on positive contribution gains, ignore allocated fixed overheads, and incorporate opportunity costs where capacity is constrained.

Typically, 1 to 2 questions appear in each Cambridge Accounting Paper 1 examination, testing special order acceptance, make-or-buy cost comparisons, or product shutdown evaluations.

Yes. Working through topical questions from 1999 to 2024 trains students to isolate relevant incremental revenues and incremental costs rapidly without falling for fixed cost distractors.

Yes, solving questions repeatedly trains your mind to immediately check whether idle capacity exists and whether fixed costs will increase as a consequence of the decision.

Common errors include rejecting special orders because the price is below total absorption cost (even though it yields positive contribution), treating allocated general fixed overheads as avoidable, and omitting lost contribution from displaced sales.

Spend two focused revision sessions mastering relevant costing concepts, special order acceptance criteria, make-or-buy evaluations, and shutdown decisions.

Yes. The topical past paper PDF compiles official Cambridge exam questions with comprehensive mark schemes, making it ideal for independent study and exam practice.