Please explain any math involved with preparing this journal entry as I`m not an accounting major, this is confusing for me. Thank you!

Powells Warehouse distributes hardback books to retail stores and extends credit terms of 2/10, n/30 to all of its customers. During the month of June, the following merchandising transactions occurred.

June

1 Purchased books on account for $1,040 from Catlin Publishers, terms 2/10, n/30.

3 Sold books on account to Garfunkle Bookstore for $1,200. The cost of the books sold was $720.

6 Received $40 credit for books returned to Catlin Publishers.

9 Paid Catlin Publishers in full.

15 Received payment in full from Garfunkle Bookstore.

17 Sold books on account to Bell Tower for $1,200. The cost of the merchandise sold was $730.

20 Purchased books on account for $800 from Priceless Book Publishers, terms 1/15, n/30.

24 Received payment in full from Bell Tower.

26 Paid Priceless Book Publishers in full.

28 Sold books on account to General Bookstore for $1,300. The cost of the merchandise sold was $780.

30 Granted General Bookstore $130 credit for books returned costing $80.

Instructions Journalize the transactions for the month of June for Powells Warehouse using a perpetual inventory system.

Journalize, post, and prepare a partial income statement.