Answer:
($3,900) unfavorable
Step-by-step explanation:
The variable overhead controllable variance is computed as;
= Actual hours × ( Standard rate per hour - Actual rate per hour)
Actual hours = 2,500 units × 3
= 7,500
Standard rate per hour = $1.91 per hour
Actual rate per hour = Total variable cost / Actual hours
= 7,500 × ($1.91 - $18,200 / 7,500)
= 7,500 × ($1.91 - $2.43)
= 7,500 × - $0.52
= ($3,900) unfavorable