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Calculating Weighted Average Cost inventory Values. The Mann Corporation began operations in 2011, information relating to the company's purchases of inventory and sales of products for 2011 and 2012 is presented below. 2011 Sold March Purchase 200 units 520 per unit June 1 120 units 550 per un September 1 Purchase 100 units 528 per unit November Sold 130 units @ $50 per unit 2012 March Purchase 100 units 532 per unit June 1 Sold 80 units 550 per unit September 1 Purchase 100 units 536 per unit November Sold 100 units 570 per unit Calculate the weighted-average cost of goods sold and ending inventory for 2011 and 2012 assuming use of (a) the periodic method and (b) the perpetual method. a. Weighted Average Periodic. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number 2011 Cost of goods sold 5 Ending inventory 2012 Cost of goods solds Ending inventory b. Weighted Average Perpetual. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number. 2011 Cost of goods sold Ending inventory $ 2012 Cost of goods sold Ending inventory 3 Ox OX