Addison, Inc. uses a perpetual inventory system. Below is information about one inventory item for the month of September. Sep.1Inventory4Sold10Purchased17Sold30Purchased20unitsat$2010units30unitsat$2520units10unitsat$30 If Addison uses FIFO, the September 17 entry for cost of goods sold would be: b. Inventory Cost of Goods sold Ce. Sales 450 Cost of Goods Sold