List of Accounts Attempts: 2 of 3 used (b) 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 decimal places, eg. 125.) FIFO LIFO Average-cost Cost of goods sold I eTextbook and Media List of Accounts Attempts: 0 of 3 used Submit Answer Save for Later SMUW Allempl History Current Attempt in Progress The accounting records of Sheffield Corp. show the following data. Beginning inventory Purchases Sales 3,000 units at $5 9,500 units at $7 10,400 units at $10 (a) Your answer is correct. Calculate average unit cost. (Round answer to 3 decimal places, eg. 5.125.) Average unit cost $ 6.520 per unit