What am I doing wrong with my April 17th entry?

Exercise 5-3 Recording purchases, purchases returns, and purchases allowances LO P1 Prepare journal entries to record the following transactions for a retail store. The company uses a perpetual inventory system and the gross method. Apr. 2 Purchased $6,600 of merchandise from Lyon Company with credit terms of 2/15, n/60, invoice dated April 2, and FOB shipping point. 3 Paid $220 cash for shipping charges on the April 2 purchase. 4 Returned to Lyon Company unacceptable merchandise that had an invoice price of $700. 17 Sent a check to Lyon Company for the April 2 purchase, net of the discount and the returned merchandise. 18 Purchased $12,500 of merchandise from Frist Corp. with credit terms of 1/10, n/30, invoice dated April 18, and FOB destination. 21 After negotiations, received from Frist a $500 allowance toward the $12,500 owed on the April 18 purchase. 28 Sent check to Frist paying for the April 18 purchase, net of the allowance and the discount. Answer is not complete. Credit No 1 Date Apr 02 General Journal Merchandise inventory Accounts payable-Lyon Debit 6,600 6,600 Apr 03 220 Merchandise inventory Cash 220 Apr 04 700 Accounts payableLyon Merchandise inventory 700 Apr 17 6,600 X Accounts payable-Lyon Merchandise inventory Cash 132 X 6,468 Apr 18 12,500 Merchandise inventory | Accounts payable-Frist 12,500 Apr 21 500 Accounts payableFrist Merchandise inventory 500 Apr 28 12,000 Accounts payable-Frist Merchandise inventory 120 11,880