Question

Difficulty: HardPreparation of Manufacturing Account and Cost of Production

The following balances were extracted from the accounting records of Plateau Manufacturing Ltd for the financial year ended 31 December 2025:

Accounting ItemAmount (₦)
Opening inventory of raw materials45,000
Purchases of raw materials180,000
Carriage inwards on raw materials12,000
Closing inventory of raw materials35,000
Direct wages paid (₦5,000 accrued at year end)90,000
Direct factory expenses28,000
Factory supervisor's salary40,000
Depreciation of factory plant35,000
Factory power and fuel22,000
Opening work-in-progress18,000
Closing work-in-progress24,000

What is the total Cost of Production for the year?

Answer: 416000

Answer

The Cost of Production for the year is ₦416,000.
The Cost of Production is ₦416,000. It is derived by first calculating Raw Materials Consumed (₦45,000 + ₦180,000 + ₦12,000 - ₦35,000 = ₦202,000). Adding Direct Labor inclusive of accruals (₦90,000 + ₦5,000 = ₦95,000) and Direct Expenses (₦28,000) yields a Prime Cost of ₦325,000. Adding total Factory Overheads (₦40,000 + ₦35,000 + ₦22,000 = ₦97,000) gives total factory costs of ₦422,000. Finally, adjusting for Work-in-Progress (+ ₦18,000 Opening WIP - ₦24,000 Closing WIP) gives ₦416,000.

Step-by-Step Solution

1
Calculate Cost of Raw Materials Consumed
₦202,000
Raw materials consumed equals opening raw materials inventory (���45,000) plus purchases (₦180,000) plus carriage inwards (₦12,000) minus closing raw materials inventory (₦35,000).
2
Calculate Prime Cost
₦325,000
Prime Cost is the sum of raw materials consumed (₦202,000), total direct wages incurred including year-end accruals (₦90,000 paid + ₦5,000 accrued = ₦95,000), and direct expenses (₦28,000).
3
Calculate Total Factory Overheads
₦97,000
Factory Overheads comprise indirect manufacturing expenses: factory supervisor salary (₦40,000), plant depreciation (₦35,000), and factory power and fuel (₦22,000).
4
Adjust for Work-in-Progress to determine Cost of Production
₦416,000
Cost of Production is Prime Cost (₦325,000) plus Factory Overheads (₦97,000) plus Opening Work-in-Progress (₦18,000) minus Closing Work-in-Progress (₦24,000).

Key Concept

Calculation of Manufacturing Account components including Prime Cost, Factory Overheads, and Work-in-Progress adjustments.
Rate this question