The accounting records of Bramble Corp. show the following data. Beginning inventory Purchases 4,500 units at $5 8,000 units at $7 9.000 units at $10 Sales Calculate average unit cost. (Round answer to 3 decimal places, eg. 5.125.) Average unit cost $ 6.28 per unit 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