The inventory records for Radford Co. reflected the following

Beginning inventory @ May 1	100 units @ $4.00
First purchase @ May 7	300 units @ $4.40
Second purchase @ May 17	500 units @ $4.60
Third purchase @ May 23	100 units @ $4.80
Sales @ May 31	900 units @ $7.80

1.Determine the weighted average cost per unit (rounded) for May.

A.$4.45

B.$4.50

C.$5.12

D.$6.34

2.Determine the amount of ending inventory assuming the FIFO cost flow method.

A.$480

B.$440

C.$400

D.$940

3.Determine the amount of gross margin assuming the FIFO cost flow method.

A.$2,920

B.$3,420

C.$3,000

D.$4,020