April 2 Purchased $5,600 of merchandise from Lyon Conpany with credit terms of 2/15, n/60, invoice dated April 2 , and FOB shipping point. April 3 Paid $250 cash for shipping charges on the April 2 purchase. April 4 Returned to Lyon Company unacceptable nerchandise that had an invoice price of $650. April 17 Sent a check to Lyon Company for the April 2 purchase, net of the discount and the returned merchandise. April 18 Purchased $10,500 of merchandise from Frist Corporation with credit teras of 1/10, n/30, invoice dated Aprit 18, and FOB destination. April 21 After negotiations over scuffed merchandise, received from Frist a $500 allowance toward the $10,500 owed on the April 18 purchase. April 28 Sent check to Frist paying for the April 18 purchase, net of the allowance and the discount