Jake Co. recorded the following data pertaining to raw material X during January 2018:

	Units
	Received	Cost	Issued	On Hand
1/1/12 inventory		$8.00		3,200
1/11/12 inventory			1,600	1,600
1/22/12 purchase	4,800	$9.60		6,400

What is the weighted-average cost per unit of material X at January 31, 2018, assuming that Jake Co. uses the perpetual inventory procedure.

A)$9.20

B)$8.96

C)$9.60

D)$8.80