Answer:
$1.89 per machine hour
Step-by-step explanation:
With regards to the above information, we can say that since the associated rate variance is unfavorable, then, that amount must be subtracted from the actual maintenance cost so that we can arrive at the standard maintenance cost.
Standard maintenance cost = $ 13,680 - $450
= $13,230
Also, during July, 7,000 machine hours were actually worked , hence the standard machine maintenance cost per machine hour would be;
= $13,230 / 7,000
= $1.89
Therefore, the cost was $1.89 per machine hour.