Hyphen Corporation Uses a Standard Costing System -Refer to the Figure

Hyphen Corporation uses a standard costing system. Information for the month of June is as follows:
The factory overhead rate is based on a normal volume of 12,000 direct labour hours. Standard cost data at 12,000 direct labour hours were as follows:
$\begin{array}{lr}\text { Actual manufacturing overhead costs }(\$ 26,000 \text { is fixed) }&\$80,000\\\text { Direct labour: }\\\text { Actual hours worked } & 12,000 \text { hours } \\\text { Standard hours allowed for actual production } & 10,000 \text { hours } \\\text { Average actual labour cost per hour } & \$ 18\end{array}$ $\begin{array}{lr}\text { Variable factory overhead } & \$ 48,000 \\\text { Fixed factory overhead } & 24,000 \\\text { Total factory overhead } & \$ 72,000\end{array}$
-Refer to the Figure.What is the variable overhead efficiency variance for Hyphen?

A) $2,000 (U)
B) $4,000 (U)
C) $8,000 (U)
D) $20,000 (U)