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 1,400 units @ $4.40 1,500 units @ $4.60 1,700 units e $4.70 1,300 units @ $4.80 4,500 units e $6.30 What is the amount of gross margin assuming the weighted-average inventory cost flow method? places.) Multiple Choice $21,600 $14,400 $6,750 $7,515