E Menu Inventory Costing Methods-Perpetual Method Gleem Sales Corporation uses the perpetual inventory tem. On January 1, 2012, Gleem had: 2.600 units of product B with a unit cost of $44 per unit.A summary of purchases and sales during 2012 follows: Unit Units Units Cost Purchased Sold Jan. 3 Mar. 8 $48 3,000 June 13 Sept 19 54 Nov.23 59 1,200 Dec.28 1,600 0e 2,000 800 1,800 Required a. Assume that Gleem uses the first-in, first-out method. Compute the cost of goods sold for 2012 and the ending inventory balance at December 31.2012 for product B b. Assume that Gleem uses the last-in, first-out method. Compute the cost of goods sold for 2012 and the ending inventory balance at December 31.2012 for product B c. Assume that Gleem uses the weighted-average cost method. Compute the cost of goods sold for 2012 and the ending inventory balance at December 31. 2012, for product B. Do not round until your final nswers, Round answers to the nearest dollar ou. compute the cost of goods sold for 2012 and the ending inventory balance at December 31, 2012, for product B. Do not round until your final answers. Round answers to the nearest dollar. a. First-In, First-Out Ending Inventory $ Cost of goods Sold b. Last-In, First-Out Ending Inventory Cost of Goods Sold C Weighted Average Ending Inventory Cost of Goods Sold