Calculate the cost of raw materials consumed?

Given:

Stock of raw materials 1/40…………N11 150
Purchases of raw materials………….N112 550
Raw material returned………………N31 150
Stock of Raw materials 31/12/04……..N27 150

A. N156 000
B. N38 300
C. N183 150
D. N66 550

Correct Answer:

Option D – N66 550