Mars Company manufactures and sells three products. Relevant per unit data concerning each product are given below.

		Product
		A		B		C
Selling price		$10		$13		$20
Variable costs and expenses		$5		$9		$17
Machine hours to produce		2		1		2

Compute the contribution margin per unit of limited resource (machine hours) for each product. (Round contribution margin per unit to 2 decimal places, e.g. 1.25.)