The inventory records for Radford Co. reflected the following Beginning inventory e May First purchase May 7 second purchase e May 17 Third purchase e May 23 Sales May 31 800 units e $3.20 900 units $3.40 1,100 units $3.50 700 units $3.60 2, 700 unitse $5.10 Determine the amount of gross calculations to 2 decimal places.) margin assuming the weighted average cost flow method. (Round your intermediate Mutiple Choice $5 400