need help please!

Joumalize entries for the following related transactions of Greenvile Heating \& Air Company. Fefer to the chart of accounts for the exact wording of the account titles. CNOW joumals do not use lines for joumal explanations. Every ine on a joumal page is used for debit or credit entries. CNOW joumals will automatically indent a credit entry when a credit amount is entered. Mar. 1 Purchased $57,000 of merchandise from Foster Co. on account, terms 2/10,n/30. 9. Paid the amount owed on the inveice within the discount period. 11 Discovered that $11,000 of the merchandise purchased on March 1 was defective and returned hems, receiving credit for $10,780[$11,000 - ($11,0002%)]. 18 Purchased $6,300 of merchandise from Foster Co. on account, torms n/30. 20 Recelved a retund trom Foster Co. for retum on Mar. 11 less the purchase on Mar. 18