i need help understanding how to do these

Mayfair Company completed the following transactions and uses a perpetual Inventory system. June 4 Sold $800 of merchandise on credit (that had cost $500) to Natara Morris, terms n/15. June 5 Sold $9,000 of merchandise (that had cost $5,400) to customers who used their Zisa cards. Bisa charges a 38 fee. June 6 Sold $6,000 of merchandise (that had cost $3,600) to customers who used their Access cards. Access charges a 21 fee. June 8 sold $5,000 of merchandise (that had cont $2,900) to customers who used their Access cards. Access charges a 11 fee. June 13 Wrote off the account of Abigail Mekee against the Allowance for Doubtful Accounts. The $600 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. Required: Prepare journal entries to record the preceding transactions and events. View transaction list Journal entry worksheet Record cost of goods sold, $500. Note: Enter debits before credits General Journal Debit Credit Date June 04