Question

Difficulty: MediumFactory Overheads and Indirect Manufacturing Costs

The following extract was taken from the books of Koko Furniture Manufacturing Enterprise for the year ended 31st December 2025:

ItemAmount (₦)
Factory rent paid180,000
Direct wages paid250,000
Factory supervisor salary paid120,000
Factory power and lighting45,000
Depreciation of factory plant30,000

Additional information:
1. Prepaid factory rent at the end of the year amounted to ₦30,000.
2. Factory supervisor salary accrued at the year end was ₦15,000.

What is the total amount of factory overheads to be charged in the manufacturing account?

  1. ₦360,000Answer
  2. B
    ₦610,000
  3. C
    ₦390,000
  4. D
    ₦375,000

Answer

₦360,000
The total factory overheads calculation properly includes only indirect manufacturing costs adjusted for accruals and prepayments: adjusted factory rent (₦180,000 paid minus ₦30,000 prepaid = ₦150,000), adjusted factory supervisor salary (₦120,000 paid plus ₦15,000 accrued = ₦135,000), factory power and lighting (₦45,000), and depreciation of factory plant (₦30,000). Direct wages of ₦250,000 are a prime cost element and are correctly excluded. Summing these items yields ₦360,000.

Step-by-Step Solution

1
Identify indirect costs and exclude direct costs
Direct wages of ₦250,000 are excluded because they form part of Prime Cost, not Factory Overheads.
Factory overheads only comprise indirect manufacturing costs.
2
Adjust indirect expenses for prepayments and accruals
Adjusted Factory Rent = ₦180,000 - ₦30,000 (prepayment) = ₦150,000. Adjusted Supervisor Salary = ₦120,000 + ₦15,000 (accrual) = ₦135,000.
Prepaid expenses relate to future periods and must be deducted, while accrued expenses relate to the current period and must be added.
3
Sum all indirect manufacturing costs to find total factory overheads
Total Factory Overheads = ₦150,000 (Rent) + ₦135,000 (Supervisor Salary) + ₦45,000 (Power & Lighting) + ₦30,000 (Depreciation) = ₦360,000.
The manufacturing account aggregates all indirect factory expenses to determine total factory overheads.

Key Concept

Factory Overheads and Indirect Manufacturing Costs
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