Answer:
$42
Step-by-step explanation:
Data provided as per the requirement of contribution margin per hour of machine time is here below:-
Unit Contribution Margin = $21
Machine Time required by fancy lamp = 0.50 hours
The computation of contribution margin per hour of machine time is shown below:-
Contribution Margin Per Hour of machine time = Unit Contribution Margin ÷ Machine Time required by fancy lamp
= $21 ÷ 0.50 hours
= $42
Therefore for computing the contribution margin per hour of machine time we simply divide the unit contribution margin by machine time required by fancy lamb.