Onow Attempt History Current Attempt In Progress - Your answer is partially correct. Sheffield Lake Corporation's accounting records show the following at year-end December 31, 2017 Purchase Discounts $5,920 Beginning Inventory $33,390 Freight-In 9,470 Ending Inventory 28,600 Freight-Out 12,460 Purchase Returns and Allowances 4,860 Purchases 163,710 Assuming that Sheffield Lake Corporation uses the periodic system, compute cost of goods purchased and cost of goods sold. Cost of goods purchased $ 162400 Cost of goods sold $ 157720