In: Accounting
Assume that Vickers Manufacturing estimates it will spend $1 million on overhead expenses. Vickers is a highly automated manufacturing plant; therefore, the majority of its overhead expenses relate to machinery (depreciation, repairs and maintenance, electricity used). Machine hours used would be a reasonable way to allocate overhead costs to products because use of machinery causes (or drives) overhead expenses. Vickers estimates that it will run its machines for 40,000 hours during the year.
(1) Please provide the formula that would be used to calculate Vickers’ predetermined overhead rate and perform the calculation. Why is it necessary to calculate a predetermined overhead rate?
(2) The calculation you used in the formula above should have included an activity base. Considering the different activity bases that could potentially be used, is it relevant that Vickers is described as a “highly automated” manufacturing plant? What might be the result if direct labor hours were used as the activity base (instead of machine hours) in a situation like this?
(3) Using the pre-determined overhead rate calculated above, calculate the overhead that would be allocated to a product that uses 3.5 hours of machine time. What will happen if actual overhead costs turn out to be higher or lower than this calculation?
(1) Calculation of pre - determined overheads rate:
Pre determined overhead rate = Total overhead expenses / number of machine hours
= $1,000,000 / 40,000 machine hours
= $25 per machine hour.
It is necessary to calculate pre determined overheads so that the total overhead expenses of the organisation can be spread over the products manufactured, and it helps in ascertaining the total cost allocated to the product.
(2) Since the basis taken is machine hours, it shows that the company is more depended over the machines and its process of production is automated. This helps to allocate the total cost on the basis of relevant basis.
If the basis would have taken direct labor hours, it would mean that the basis of production is direct labor that shows less automation. The basis should be carefully decided as all the indirect costs would be allocated to products on that basis only.
The result of using direct labor hours as basis would result in allocation of more overheads to the product which consumes more direct labor hours.
(3) Overheads allocated = Pre determined overhead rate * Machine hours
= $25 per machine hour * 3.5 machine hours
= $87.5
If the actual overheads costs are more than allocated overheads it will result into under allocated overheads and hence reduce the cost of goods sold unless adjustment is made. Similarly, if the actual overheads costs are less than allocated overheads it will result into over allocated overheads and hence increase the cost of goods sold unless adjustment is made.