Inventory Costing Methods-Periodic Method Chen Sales Corporation uses the periodic inventory system. On January 1, 2012, Chen had 1.000 unes of product A with a summary of purchases and sales during 2012 follows: Unit Units Units Cost Purchased Sold Feb2 Apr 400 $72 1,800 July 10 1,600 Aug 9 76 800 800 79 1,200 0123 Dec 30 Required a. Assume that Chen 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 A b. Assume that Chen 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 A c. Assume that Chen uses the weighted-average cost method. Compute the cost of gods sold for 2012 and the ending inventory balance at December 31, 2012, for product A Do not round until your final answers. Round your answers to the nearest dollar. First in First-out Ending inventory S Cost of Goods Sold S 0 Last-in, first-out Ending Inventory Cast of Goods Sold S Weighted Average Ending inventory Cost of goods sold s who would you choose to