The accounting records of Metlock, Inc. show the following data. Beginning inventory Purchases Sales 3,140 units at $8 8,070 units at $10 9,643 units at $13 Calculate average unit cost. (Round answer to 3 decimal places, eg. 5.125.) Average unit cost $ per unit e Textbook and Media List of Accounts Determine cost of goods sold during the period under a periodic inventory system using the FIFO method, the LIFO method, and the average-cost method. (Round answers to O decimal places, eg. 125.) FIFO LIFO Cost of goods sold Average-cost $ $