Mar. 10 Purchase Periodic inventory by three methods; cost of goods sold The units of an item available for sale during the year were as follows: Jan. 1 Inventory 40 units at $128 70 units at $140 30 units at $144 Dec. 12 Purchase 60 units at $148 There are 80 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the ending inventory cost bond the cost of goods sold by three methods, Round interim calculations to one decimal and final answers to the nearest whole dollar. Aug. 30 Purchase Cost of Ending Inventory and Cost of Goods Sold Inventory Method Ending Inventory Cost of Goods Sold First-in, first-out (FIFO) $ Last-in, first-out (LIFO) Weighted average cost