Periodic inventory by three methods; cost of goods sold The units of an item available for sale during the year were as follows: Date Line Item Description Units and Cost Jan. 1 Inventory 40 units at $102 Mar. 10 Purchase 70 units at $114 Aug. 30 Purchase 20 units at $118 Dec. 12 Purchase 70 units at $122 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 and the cost of