Question 4 9ots Assume that alry Company uses a periodic inventory system and has these account balances Purchases 45.000 Sales 83.400 Purchase Retums & Allowances 7.600 Inventory (12/31/20201 37.800 Freight in 3,600 Inventory (1/1/2020) 35.000 Purchase Discounts 900 Sales Returns and Allowances 12,510 Freight-Out 4.800 Sales Discounts 5,430 REQUIRED: Calculate (please show your work) a) Cost of goods sold b) Gross Profit c) Gross Profit Percent