The net profit was N2,650,000 using absorption costing and the closing inventory was 14,600 units. Production overhead absorption rate was N18.50 per unit. If the Non-production absorption rate was N14.00 per unit, then the net profit using marginal costing is:
A. N2,379,900
B. N2,445,600
C. N2,650,000
D. N2,854,400
E. N2,920,100

Answer:
A. N2,379,900

Explanation:
To convert the profit from absorption costing to marginal costing, we need to adjust for the fixed production overheads included in the closing inventory. The formula is:

Change in Profit = Change in Inventory × Fixed Production Overhead per unit

The change in profit due to inventory is calculated as:


=N270,100 = N270,100

Since we are moving from absorption to marginal costing, we subtract this amount from the absorption costing profit:

N2,650,000 N270,100 = N2,379,900

Thus, the profit using marginal costing is N2,379,900.