Addison, Inc. uses a perpetual inventory system. Below is information about one inventory item for the month of September. Sep 1 Inventory 20 units at $20 4 Sold 10 units 10 Purchased 30 units at $25 17 Sold 20 units 30 Purchased 10 units at $30 Use the information in the table to answer this question. If Addison uses FIFO, the September 17 entry for cost of goods sold would be: 450 450 450 450 a. Cost of Goods Sold Sales b. Inventory Cost of Goods Sold c. Cost of Goods Sold Inventory d. Sales Cost of Goods Sold 450 450 450 450