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 1,300 units $4.20 1,400 units $4.40 1,600 units $4.50 1,200 units e $4.60 4,200 units $6.10 Determine the amount of gross margin assuming the weighted average cost flow method. (Round your intermediate calculations to 2 decimal places.) Multiple Choice $6,300