The accounting records of Sheridan Company show the following data. Beginning inventory Purchases Sales 3,000 units at $6 9,000 units at $8 10,400 units at $11 Calculate average unit cost. (Round answer to 3 decimal places, e.g. 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 0 decimal places, e.g. 125.) FIFO LIFO Average-cost Cost of goods sold $