eBook Show Me How Periodic Inventory by Three Methods; Cost of Merchandise Sold The units of an item available for sale during the year were as follows: Jan. 1 Mar. 10 Aug. 30 Inventory 50 units @ $96 Purchase 60 units $104 Purchase 20 units @$112. Dec. 12 Purchase 70 units $116 There are 80 units of the item in the physical inventory at December 31. The periodic ventory system is used. Determine the inventory cost and the cost of merchandise sold by three methods. Round interim calculations to one decimal and final answers to the nearest whole dollar. Cost of Merchandise Inventory and Cost of Merchandise Sold Inventory Method Merchandise Inventory. Merchandise Sold First-in, first-out (FIFO) 9,240 11,960 X Last-in, first-out (LIFO) 7,720 X 13,480 Weighted average cost 8,480 X 12,720 X Foodback