Mayfair Company completed the following transactions and uses a perpetual inventory system.

June $4$ Sold $$900$ of merchandise on credit $($that had cost $$500)$ to Natara Morris, terms $\frac{n}{15}.$

June $5$ Sold $$10,000$ of merchandise $($that had cost $$6,000)$ to customers who used their Zisa cards. Zisa charges a $1\%$ fee.

June $6$ Sold $$7,000$ of merchandise $($that had cost $$4,200)$ to customers who used their Access cards. Access charges a $3\%$ fee.

June $8$ Sold $$6,000$ of merchandise $($that had cost $$2,900)$ to customers who used their Access cards. Access charges a $28$ fee.

June $13$ Wrote off the account of Abigail McKee against the Allowance for Doubtful Accounts. The $$720$ balance in McKee's account was from a credit sale last year.

June $18$ Received Morris's check in full payment for the June $4$ purchase.