Answer:
$390F
Step-by-step explanation:
The Dermody variance for vehicle operating cost can be determined using the below mentioned formula:
Dermody vehicle operating cost variance=Planned vehicle operating cost- Actual vehicle operating cost
In the given question
Planned vehicle operating cost=$3,010+$331*15
=$7,975
Actual vehicle operating cost=$7,585
Dermody vehicle operating cost variance=$7,975-$7,585
=$390F