a b and c please!!

Journalize the following merchandise transactions: a. Sold merchandise on account, $12,900 with terms n/30. The cost of the goods sold was $7,740. If an amount box does not require an entry, leave it blank. b. Received payment. If an amount box does not require an entry, leave it blank. c. Refunded $530 to customer for defective merchandise that was not returned. If an amount box does not require an entry, leave it blank