Required information [The following information applies to the questions displayed below.] The Inventory records for Radford Co. reflected the following: 9 | Beginning inventory May 1 First purchase 7 May Second purchase @ May 17 Third purchase May 23 Sales May 31 890 units @ $3.20 e8 units $3.48 1.100 units @ $3.50 700 units @ $3.68 2.700 units @ $5.10 If the company uses the weighted average Inventory cost flow method, what is the average cost per unit (rounded) for May? O O O O