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Required information [The following information applies to the questions displayed below] Hemming Co, reported the following current-year purchases and sales for its only product. Required: Hemming uses a periodic inventory system. (a) Determine the costs assigned to ending inventory and to cost of goods sold using FIFO. (b) Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. (c) Compute the gross margin for each method. c) Grors Mlargin [The following information applies to the questions displayed below] Warnerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. Required: 1. Compute cost of goods available for sale and the number of units available for sale