The accounting records of Oriole Electronics show the following data. Beginning inventory Purchases Sales 3,000 units at $6 9,500 units at $8 10,500 units at $11 Calculate weighted-average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted-average unit cost $ eTextbook and Media 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, e.g. 125.) Cost of $ goods sold FIFO $ LIFO $ Average-cost