Answer: $109.3 per machine hour
Explanation: We can compute total production engineering cost per hour by using following equation :-
[tex]=cost\:per\:machine\:hour=\frac{fixed\:cost\:+\:variable\:cost}{total\:machine\:hours}[/tex]
but first we need to calculate variable cost at 9600 hours :-
[tex]=\$829,560\times\frac{9600hr}{9300hr}[/tex]
= $856,320
now,
[tex]=cost\:per\:machine\:hour=\frac{\$192,960+\$856,320}{9600hr}[/tex]
=$109.3 per machine hour