4 The income statement of Pinkley, Inc. includes the items listed below Net sales $900.000 Gross profit 320,000 Beginning inventory 90,000 Purchase discounts 18,000 Purchase returns and allowances 8,000 Freight-in 15,000 Operating expenses 340,000 Purchases 560,000 Instructions Use the appropriate items listed above as a basis for determining (a) Cost of goods sold. (b) Cost of goods available for sale (c) Ending inventory