Answer: $425,000
Explanation: The total overhead cost can be computed suing following formula :-
total overhead cost = fixed overhead cost + variable overhead cost
where,
fixed overhead cost = $90,000
[tex]variable\:overhead\:cost=\frac{\$375,000}{75,000\:hours}\times 67,000\:hours[/tex]
=$335,000
so,putting the values into equation we get :-
total overhead cost = $90,000 + $335,000
= $425,000