Answer:
$144 unfavorable
Explanation:
The computation of the overall fixed manufacturing overhead volume variance for the month is shown below:
But before that following calculations need to be done
Budgeted manufacturing overhead is
= 6600 × $1.20
= $7,920
And,
Manufacturing overhead applied is
= Standard hours × Predetermined overhead rate
= 6480 × $1.20 = $7,776
So, fixed manufacturing overhead volume variance is
= Fixed overhead applied - budgeted fixed overhead
= $7,776 - $7,920
= $144 unfavorable