The inventory records for Radford Co. reflected the following Beginning inventory @ May 1 First purchase e May 7 second purchase e May 17 Third purchase May 23 Sales May 31 800 units @ $3.20 900 units @ $3.40 1,100 units@ $3.50 700 units @ $3.60 2,700 units @ $5.10 Determine the amount of gross margin assuming the FIFO cost flow method. Multiple Choice $4,340 $5,130 $4,650 $9,120