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Metlock, Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 94 units were sold. Compute the ending inventory at May 31 and cost of goods sold using the FIFO, LIFO, and average-cost methods. (Round per unit cost to 3 decimal places, e. 3.15 .647 and final answers to 0 decimal places, e.g. 5,125.) Metlock, Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 94 units were sold. Compute the ending inventory at May 31 and cost of goods sold using the FIFO, LIFO, and average-cost methods. (Round per unit cost to 3 decimal places, e. 3.15 .647 and final answers to 0 decimal places, e.g. 5,125.)