I want the process of the solution

Assume that Gallant Company uses a periodic inventory system and has these account balances: Purchases $482,780; Purchase Returns and Allowances $12,670; Purchase Discounts $9,080; and Freight-In $16,200. Gallant Company has beginning inventory of $62,300, ending inventory of $87,170, and net sales of $739,570. Determine the amounts to be reported for cost of goods sold and gross profit