Question

Difficulty: Very hardDirect Costs and Calculation of Prime Cost

The following extract of financial information was taken from the books of Kemi Manufacturing Enterprises for the financial year ended 31st December 2025:

ItemAmount (₦)
Opening inventory of raw materials45,000
Purchases of raw materials220,000
Carriage inwards on raw materials15,000
Return outwards of raw materials10,000
Direct manufacturing wages130,000
Factory supervisor's salary40,000
Royalties paid per production unit25,000
Carriage outwards on finished goods18,000
Depreciation of factory plant & machinery22,000
Closing inventory of raw materials50,000

Based on the figures provided, what is the total Prime Cost of production?

  1. ₦375,000Answer
  2. B
    ₦415,000
  3. C
    ₦393,000
  4. D
    ₦437,000

Answer

The total Prime Cost of production is ₦375,000.
The correct figure of ₦375,000 is arrived at by determining the Cost of Raw Materials Consumed (Opening Stock ₦45,000 + Purchases ₦220,000 + Carriage Inwards ₦15,000 - Returns Outwards ₦10,000 - Closing Stock ₦50,000 = ₦220,000) and adding Direct Manufacturing Wages (₦130,000) and Direct Expenses/Royalties (₦25,000).

Step-by-Step Solution

1
Calculate the Cost of Raw Materials Consumed
₦220,000
Cost of Raw Materials Consumed = Opening Inventory (₦45,000) + Purchases (₦220,000) + Carriage Inwards on Raw Materials (₦15,000) - Return Outwards of Raw Materials (₦10,000) - Closing Inventory (₦50,000) = ₦220,000.
2
Identify all direct production costs
Direct Wages = ₦130,000; Direct Expenses (Royalties) = ₦25,000
Royalties paid per unit produced are direct expenses; direct manufacturing wages are direct labor.
3
Sum up the components of Prime Cost
₦375,000
Prime Cost = Raw Materials Consumed (₦220,000) + Direct Wages (₦130,000) + Royalties (₦25,000) = ₦375,000.

Key Concept

Prime Cost represents the total sum of direct costs incurred in production: Direct Raw Materials Consumed + Direct Labor Wages + Direct Expenses (such as Royalties). Indirect costs (factory overheads) and administrative/distribution costs must be excluded.
Estimated Time:2m 0s
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