i need help with a b , c please

BusinessCourse Support Dashboard Rack Question 3 Parally correct Mark 0.33 of 100 Flag question Inventory Costing Methods-Periodic Method Chen Sales Corporation uses the periodic inventory system. On January 1, 2012, Chen had: 1,000 units of product A with a unit cost of $70 per unit. A summary c purchases and sales during 2012 follows: Unit Units Units Cost Purchased Sold Feb2 400 Apr 572 1.000 July 10 1.000 Augs 76 00:23 300 79 1.200 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 goods 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 dolar. First in tou Ending inventory S Cast of Good Son La first-out ON GM 4 ON 11.M Ending inventory com of Goods Sold Weighted Arge Eting weary cu of goo ON 714 Sury 000 #Return to course a