The contribution margin per unit of the constrained resource for product B, if labor time is the constrained resource is $3 per minute.
Using this formula
Contribution margin per unit = Contribution per unit / Limiting Factor required per unit
Where:
Contribution per unit=$6
Limiting Factor required per unit=2
Let plug in the formula
Contribution margin per unit=$6/2
Contribution margin per unit=$3 per minute
Inconclusion the contribution margin per unit of the constrained resource for product B, if labor time is the constrained resource is $3 per minute.
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