The inventory records for Redford Company reflected the following: Beginning inventory @ May 1 9e0 units @ $3.40 First purchase @ May 7 1,080 units @ $3.60 Second purchase May 17 1,200 units @ $3.70 Third purchase @ May 23 800 units @ $3.80 Sales @ May 31 3,880 units @ $5.30 What is the amount of gross mergin assuming the FIFO cost flow method? Multiple Choice $4.820 $5.700 $10.730 $5.170