Blanch Inc.'s accounting records show the following at the year ending on December 31, 2021. Beginning Inventory 47,000 Ending Inventory 57,600 Purchase Returns and Allowances 12,800 Purchase Discounts $ 11,200 Freight-In 15,600 Purchases 700,020 The cost of goods sold using the periodic system is a. $681,020. b. $719,020. c. $702,220. d. $697,820.