Answer:
$1,640 Adverse
Explanation:
The variable overhead rate variance is the difference between the actual variable overhead cost and the actual hours multiplied by the standard variable overhead rate.
So we can calculate variable overhead for Amirault Manufacturing as follows:
$
4,100 hours should have cost (4100× $4.00) = 16,400
but did cost ( actual cost 18,040
Variable overhead rate variance 1,640 Adverse
Variable overhead rate variance=$1,640 Adverse