Journalize entries for the following related transactions of Greenville Heating & Air Company. Refer to the chart of accounts for the exact wording of the account titles. CNOW journals do not use lines for journal explanations. Every line on a journal page is used for debit or credit entries. CNOW journals will automatically indent a credit entry when a credit amount is entered.

Mar. $1$ Purchased $$54,200$ of merchandise from Foster Co$.$ on account, terms $2/10,$ n$/30.$

$9$ Paid the amount owed on the invoice within the discount period.

$11$ Discovered that $$7,000$ of the merchandise purchased on Mar. $1$ was defective and returned items, receiving credit.

$18$ Purchased $$6,000$ of merchandise from Foster Co$.$ on account, terms n$/30.$

$20$ Received a refund from Foster Co$.$ for return on Mar. $11$ less the purchase on Mar. $18.$