The inventory records for Radford Company reflected the following Beginning inventory on May 1 First purchase on May 7 Second purchase on May 17 1,000 units @ $3.60 1,100 units @ $3.80 Third purchase on May 23 Sale on May 31 1,300 units @ $3.90 900 units @$4.00 3,400 units @ $5.50 What is the amount of ending inventory assuming the FIFO cost flow method is used? Multiple Choice $3,620 $3,660 $3,990 O $3,600