Answer:
$0.3 per machine hour
Explanation:
The computation of the variable maintenance cost per machine hour is shown below:
Variable cost per machine hour = (High maintenance cost - low maintenance cost) ÷ (High machine hours - low machine hours)
= ($9,000 - $7,200) ÷ (20,000 hours - 14,000 hours)
= $1,800 ÷ 6,000 hours
= $0.3 per machine hour
We assume that the high low method is applied in this question