Please let me know the answers to what I got wrong. Thanks :)

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 $4,600 of merchandise from Lyon Company with credit terms of 2/15, n/60, invoice dated April 2, and FOB shipping point 3 Paid $300 cash for shipping charges on the April 2 purchase 4 Returned to Lyon Company unacceptable merchandise that had an invoice price of $600 17 Sent a check to Lyon Company for the April 2 purchase, net of the discount and the returned merchandise 18 Purchased $8,500 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 $8,500 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 complete but not entirely correct. No Date General Journal Debit Credit Apr 02 Merchandise inventory ,600 Accounts payable-Lyon ,600 Apr 03 Merchandise inventory 300 Cash Apr 04 Accounts payable-Lyon Merchandise inventory 600 600 Apr 17 Accounts payable-Lyon 4,000 Merchandise inventory Cash 3,920 Apr 18 Merchandise inventory 8,500 Accounts payable-Frist 8,500 Apr 21 Accounts payable-Frist Merchandise inventory Apr 28 Accounts payable-Frist 7,400 Merchandise inventory Cash 148 7,252