Assume the following information appears in the standard cost card for a company that makes only one product:

Standard Quantity or Hours Standard Price or Rate Standard Cost
Direct materials 5 pounds $ 11.00 per pound $ 55.00
Direct labor 2 hours $ 17.00 per hour $ 34.00
Variable manufacturing overhead 2 hours $ 4.00 per hour $ 8.00
During the most recent period, the following additional information was available:

20,000 pounds of material was purchased at a cost of $10.50 per pound.
All of the material that was purchased was used to produce 3,900 units.
8,000 direct labor-hours were recorded at a total cost of $132,000.
The actual variable overhead cost incurred during the period was $25,000.
Assuming the company uses direct labor-hours to compute its predetermined overhead rate, what is the variable overhead efficiency variance?