The accounting records of Novak Corp. show the following data. Beginning inventory Purchases Sales 3,000 units at $4 9,500 units at $6 10,100 units at $9 (a) Calculate average unit cost. (Round answer to 3 decimal places, e.g. 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 0 decimal places, e.g. 125.) FIFO LIFO Average-cost Cost of goods sold $