The accounting records of Sage Hill Electronics show the following data. Determine cost of goods sold during the period under a periodic inventory system using the FIFO method. (Round answer to 0 decimal places, eg. 1,250.) Determine cost of goods sold during the period under a periodic inventory system using the LIFO method. (Round answer to O decimal places, eg. 1,250.) Determine cost of goods sold during the period under a periodic inventory system using the average-cost method, (Round averagecost per unit to 3 decimal places, eg. 12.502 and final answer to 0 decimal places, eg. 1.250.)