April 1 Sold merchandise for $6,800, with credit terms n/30; invoice dated April 1. The cost of the merchandise is $4,080. April 4 The customer in the April 1 sale returned $760 of merchandise for full credit. The merchandise, which had cost $456, is returned to inventory. April 8 Sold merchandise for $2,900, with credit terms of 1/10, n/30 invoice dated April 8. Cost of the merchandise is $2,030. April 11 Received payment for the amount due from the April 1 sale less the return on April 4