The accounting records of Splish Brothers Inc. show the following data. Beginning inventory 5,000 units at $4 Purchases 7,500 units at $6 Sales 9,900 units at $9 Calculate average unit cost. (Round answer to 3 decimal places, eg. 5.125.) Average unit cost $ 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 $