Blue Barns sold 136 gallons of paint at $31 per gallon on July 6 to a customer with a cost of $19 per gallon to Blue Barns. Terms of the sale are 2/15, n/45, invoice dated July 6. The customer pays their account in full on July 24. On July 28, the customer discovers 17 gallons are the wrong color and returns the paint for a full cash refund. Blue Barns returns the gallons to their inventory at the original cost per gallon. Record the journal entries to recognize these transactions for Blue Barns.