Answer:
B. $42
Explanation:
Given that
Machine hours time = 3
Machine hour rate = $14
The computation of the cost of machining per phone is given below:-
= Machine hours time × Machine hour rate
= 3 × $14
= $42
So, for computing the cost of machining per phone simply we multiply the machine hour time with the machine hour rate so that the correct cost of machining per phone will come.