Addison, Inc. uses a perpetual inventory system. Below is information about one inventory item for the month of September. Use this information to answer the questions that follow. 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 If Addison uses LIFO, the cost of the ending inventory on September 30 is $800 $650 O $750 O $700