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 50 units at $120 Mar. 10 Purchase 40 units at $130 Aug. 30 Purchase 30 units at $134 Dec. 12 Purchase 80 units at $136 There are 40 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 goods sold by three methods. Round interim calculations to one decimal and final answers to the nearest whole dollar