Given;
Purchases = N20,000
Sales = N40,000
Carriage inwards = N5,000
Carriage outwards = N5,000
Opening stock = N10,000
Closing stock = N5,000

What is the cost of goods sold?

• A.N30,000
• B.N25,000
• C.N20,000
• D.N15,000
• E.