Current Attempt in Progress Sheridan Luggage uses a periodic inventory system and has the following account balances: Beginning inventory $28,520 Ending Inventory $16,560 Purchase Discounts 1,840 Purchases 220,800 Purchase Returns and Allowances 2,760 Freight-In 10,120 Operating Expenses 80,960 Net sales 449,880 Compute each of the following: (1) Net purchases $ (2) Cost of goods available for sale ta $ (3) Cost of goods sold $