The inventory records for Radford Co. reflected the following Beginning inventory @ May 1 First purchase @ May 7 second purchase @ May 17 Third purchase @ May 23 Sales @ May 31 400 units @ $2.40 500 units @ $2.60 700 units @ $2.70 300 units @ $2.80 1,500 units @ $4.30 Determine the amount of cost of goods sold assuming the LIFO cost flow method. Multiple Choice O $3,900 $4,030 O $4,200 $3,600