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

	Products
	A	B	C
Selling price	$19	$12	$20
Variable costs and expenses	$5	$10	$18
Machine hours to produce	2	1	2

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

(2) Assuming 1,710 additional machine hours are available, which product should be manufactured?