1 EX 6-13 Periodic inventory by three methods; cost of goods sold Obj. 2,4 The units of an item available for sale during the year were as follows: Jan. Inventory 180 units at $108 Mar. 10 Purchase 224 units at $110 Aug. 30 Purchase 200 units at $116 Dec. 12 Purchase 196 units at $120 There are 208 units of the item in the physical inventory at December 31. The periodic inven- tory system is used. Determine the ending inventory cost and the cost of goods sold by three methods, presenting your answers in the following form: Ending Inventory $ Cost of Goods Sold $ Inventory Method A. First-in, first-out B. Last-in, first-out C. Weighted average cost