How to solve the cost of goods avaliable in the income ststement?

At the beginning of July, CD City has a balance in inventory of $$3,300.$ The following transactions occur during the month of July.

July $3$ Purchase CDs on account from Wholesale Music for $$2,200,$ terms $\frac{1}{10},\frac{n}{30}.$

July $4$ Pay cash for freight charges related to the July $3$ purchase from Wholesale Music, $$120.$

July $9$ Return incorrectly ordered CDs to Wholesale Music and receipt of credit, $$200.$

July $11$ Pay Wholesale Music in full.

July $12$ Sell CDs to customers on account, $$5,600,$ that had a cost of $$2,900.$

July $15$ Receive full payment from customers related to the sale on July $12.$

July $18$ Purchase CDs on account from Music Supply for $$3,000,$ terms $\frac{1}{10},\frac{n}{30}.$

July $22$ Sell CDs to customers for cash, $$4,100,$ that had a cost of $$2,400.$

July $28$ Return CDs to Music Supply and receive credit of $$280.$

July $30$ Pay Music Supply in full.

Required:

Assuming that CD City uses a periodic inventory system, record the transactions.

Record the month$-$end adjusting entry to inventory, assuming that a final count reveals ending inventory with a

Required $1$

Prepare the top section of the multiple$-$step income statement through gross profit for the month of July.

$\backslash$table$[[$CD CITY$],[$Multiple$-$Step Income Statement $($partial$)],[$For the Month of July$],[$Net sales,,$$,9,700],[$Cost of goods sold:$],[$Beginning inventory,$3,300,,],[$Add: Purchases,$5,200,,],[$Add: Freight$-$in$,120,,],[$Less: Purchase returns,$480,,],[$Less: Purchase discounts,$20,,],[,0,,],[$Cost of goods available for sale,$2,480,,],[$Less: Ending inventory,$2,820,,],[$Cost of goods sold,,,$5,300],[$Gross profit,,$$,0$