3.After the amount due on a sale of $42,900, terms 2/10, n/eom, is received from a customer within the discount period, the seller consents to the return of the entire shipment. The cost of the merchandise returned was $25,740. a. What is the amount of the refund owed to the customer? $ b. Journalize the entries made by the seller to record the return and the refund. If an amount box does not require an entry, leave it blank