Assume that Tract company uses a periodic inventory system and has these account balances Purchases $555,000; Purchase Returns and Allowances $13,000, Purchase Discounts $9.000; Freight-in $16,000, Beginning Inventory $60,000, Net Sales $612.00, and Ending Inventory $90,000. Determine Net Purchases and cost of Goods Purchased. Determine Cost of Goods Sold and Gross Profit. Below is a series of cost of goods sold sections for companies A. L, N. and R Fill in the lettered blanks to complete the cost of goods sold sections