JAMB Principles of Accounts 2010 Question 23

Given:
31/12/07: Stocks ₦4 200; Rates in advance ₦1 000; Accrued wages ₦1 150
31/12/08: Stocks ₦3 900; Rates in advance ₦1 500; Accrued wages ₦1 350
Cost of goods sold was valued at ₦6 000. Cash paid for rates and wages during the year was ₦1 300 and ₦2 200 respectively.
What is the value of purchases for the year 2008?

1. A.₦6 000
2. B.₦9 900
3. C.₦14 100
4. D.₦5 700