eBook Show Me How Calculator 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 Mar. 10 Purchase Aug. 30 Purchase Dec. 12 Purchase 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 de 40 units at $90 60 units at $98 10 units at $106 90 units at $112 whole dollar. Cost of Ending Inventory and Cost of Goods Sold Inventory MethodEnding Inventory Cost of Goods Sold irst-out (FIFO) s n, flrst-out (FO heck My Work