Concept:Credit sales are found by preparing the sales ledger control account. Payments, discounts, bad debts and returns inwards all appear on the credit side and reduce the amount owed by customers.Explanation:First, total the credit side items of the sales ledger control account:Cheque received from customers =N24,000Discount allowed =N2,000Bad debts =N1,000Returns inwards =N500Total credit entries =N24,000+N2,000+N1,000+N500=N27,500The opening sales ledger balance is N2,000 on the debit side.So, credit sales are the balancing figure:Credit sales=N27,500−N2,000=N25,500Answer:Credit sales =N25,500Correct option: C. N25,500