April 2 Purchased $3,300 of merchandise from Lyon Company with credit terms of 2/15, n/60, invoice dated April 2 , and FoB shipping April 3 Paid $210 cash for shipping charges on the April 2 purchase. April 4 Returned to Lyon Company unacceptable merchandise that had an invoice price of $550. april 17 Sent a check to Lyon Company for the April 2 purchase, net of the discount and the returned merchandise. april 18 Purchased $5,900 of merchandise from Frist Corporation with credit terms of 1/10, n/30, invoice dated April 18 , and FoB destination. al 21 After negotiations over scuffed merchandise, received from Frist a $500 allowance toward the $5,900 owed on the April 18 purchase