After the amount due on a sale of $26,100, terms 1/10, n/eom, is received from a customer within the discount period, the seller consents to the return of the entire shipment for a cash refund. The cost of the merchandise returned is $15,660 a. What is the amount of the refundowed to the customer? b. Journalize the entries made by the seller to record the retum and the refund. If an amount box does not require an entry, leave it blank (0) (6) ll