Inventory Costing Methods-Perpetual Method Using the data below, assume that Graham Corporation uses the perpetual inventory system. Calculate the value of ending inventory and cost of goods sold at year-end using the perpetual method and (a) first-in, first-out, (b) last-in, first-out, and (c) weighted-average cost method. Units Unit Cost Beginning Inventory, January 1 1,200 $68 Purchases: February 11 1,500 $69 May 18 1,400 70 October 23 1,100 72 Sales: March 1 1,400 July 1 1,400 October 29 1,000 Round the cost per unit to 3 decimal places and round your final answers to the nearest dollar. a. First-In, First-Out Ending Inventory $ 100,200 Cost of goods Sold $ 262,100 b. Last-In, First-Out $ 95,700 266,600 Ending Inventory Cost of Goods Sold $ c. Weighted Average Ending Inventory $ Cost of Goods Sold $ 74,909 x 287,391 x Check