Answer:
c $4,450 U
Explanation:
The computation of the Variable overhead spending variance is shown below:
= (Standard variable overhead Rate × Actual Hour) - (Actual Rate × Actual Hour)
= ($12 × 400 units × 5.6 hours) - ($31,330)
= $26,880 - $31,330
= $4,450 Unfavorable
The (Actual Rate × Actual Hour) is also called as Actual variable overhead.
All other information which is given is not relevant. Hence, ignored it