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Wittmann Co. began operations on July 1. It uses a perpetual inventory system. During July, the company had the following purchases and sales. Your answer is correct. Calculate the average cost per unit at July 1, 6, 11, 14, 21 & 27. Determine the ending inventory under a perpetual inventory system using (1) FIFO, (2) moving-average cost, and (3) LIFO. The ending inventory under a perpetual inventory system