How do I figure out the answer to the following question? Thank you!

At the beginning of July, CD City has a balance in inventory of $2,750. The following transactions occur during the month of July. July 3 Purchase CDs on account from Wholesale Music for $1, 650, terms 2/10, n/30. July 4 Pay cash for freight charges related to the July 3 purchase from Wholesale Music, $110. July 9 Return incorrectly ordered CDs to Wholesale Music and receive credit, $200. July 11 Pay Wholesale Music in full. July 12 Sell CDs to customers on account, $4,500, that had a cost of $2, 350. July 15 Receive full payment from customers related to the sale on July 12. July 18 Purchase CDs on account from Music Supply for $2, 450, terms 2/10, n/30. July 22 Sell CDs to customers for cash, $3,550, that had a cost of $1, 850. July 28 Return CDs to Music Supply and receive credit of $170. July 30 Pay Music Supply in full. Required: 1. Assuming that CD City uses a perpetual inventory system, record the transactions. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.) View transaction list Journal entry worksheet