Which of the following statements regarding marginal costing is incorrect?

(A) It is a useful long-term planning technique.
(B) It assumes that fixed costs remain fixed over relevant activity ranges.
(C) It assumes that other costs vary in proportion to activity.
(D) It assumes that costs can be classified as variable or fixed.

When a business is faced with a limiting factor (one which limits the activity of an entity) and there is a choice to be made between options to follow, which of the following statements describes the optimal course of action?

(A) Choose the option which gives the highest unit profit.
(B) Choose the option which gives the highest unit contribution.
(C) Aim to achieve a balance of activities covering all of the options.
(D) Choose the option which gives highest contribution per unit of limiting factor.

If there has been an over recovery of overheads, at the end of the accounting period the amount concerned should be?

(A) Debited to the company profit and loss account.
(B) Credited to the company profit and loss account.
(C) Carried forward to the next accounting period as a cost saving.
(D) Used to reduce next period‘s overhead recovery rate.

If a company uses predetermined overhead recovery rates and at the end of a period finds that there has been an under-recovery of overhead, which of the following best explains how the under-recovery has occurred?

(A) Actual overhead cost has exceeded the amount used as a basis for the establishment of the predetermined rate.
(B) Actual overhead cost has been less than the amount used as a basis for the establishment of the predetermined rate.
(C) Actual activity levels were higher than planned due to an increase in demand.
(D) An expected price increase in the overhead costs which was built into the overhead recovery rate did not take place.

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