Northfield Company had the following purchases of inventory during the month of December. There were 1.400 units sold during the month. Date Transaction Units Unit Cost 12/1 Beginning inventory 500 $ 4 12/5 Purchase No. 1 600 $ 6 12/18 Purchase No. 2 500 $ 8 12/24 Purchase No. 3 400 $10 Assume that the company uses the FIFO inventory method. What is the dollar amount of the ending inventory on December 31