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 31 400 units @ $2.40 500 units @ $2.60 700 units @ $2.70 300 units @ $2.80 1,500 units @ $4.30 What is the amount of cost of goods sold assuming the LIFO cost flow method is used? Multiple Choice $4,200 $4,030 $3,900 O $3,600