Jan. 1 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: Inventory 30 units at $110 70 units at $120 10 units at $124 Purchase 90 units at $130 There are 50 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. Aug. 30 Purchase Dec. 12 Cost of Goods Sold Cost of Ending Inventory and cost of Goods Sold Inventory Method Ending Inventory First-in, first-out (FIFO) $ Last-in, first-out (LIFO) Weighted average cost