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 Inventory 50 units @ $102 Mar. 10 Purchase 50 units @ $112 Aug. 30 Purchase 30 units @ $118 Dec. 12 Purchase 70 units @ $120 There are 80 units of the item in the physical inventory at December 31. The periodic inventory system is Determine the inventory cost and the cost of merchandise sold by three methods. Round interim calcula whole dollar. Cost of Merchandise Inventory and Cost of Merchandise Sold Inventory Method Merchandise Inventory Merchandise Sold a. First-in, first-out (FIFO) b. Last-in, first-out (LIFO) c. Weighted average cost