April 2 Purchased $4,500 of merchandise from Lyon Company with credit terms of 2/15, n/60, invoice dated April 2, and FOB shipping point. April 3 Paid $240 cash for shipping charges on the April 2 purchase. April 4 Returned to Lyon Company unacceptable merchandise that had an invoice price of $600. April 17 Sent a check to Lyon Company for the April 2 purchase, net of the discount and the returned merchandise. April 18 Purchased $8,300 of merchandise from Frist Corporation with credit terms of