The inventory records for Radford Company reflected the following Beginning inventory on May 1 First purchase on May 7 Second purchase on May 17 Third purchase on May 23 Sales on May 31 600 units @ $2.80 700 units @ $3.00 900 units @ $3.10 500 units @ $3.20 2,100 units @ $4.70 What is the amount of cost of goods sold assuming the LIFO cost flow method is used? Multiple Choice $6,720 $5,880 Multiple Choice $6,720 $5,880 $6,490 $6,300