Druid Company makes a single product and uses a standard costing system that applies overhead on the basis of direct labor hours. They recently used $28,378$ labor hours to produce $483$ units. Their static budget indicated expectations of $510$ units, $30,000$ DLH and $$569,000$ in variable overhead. Actual VOH totaled $$540,210.$ What was the variable overhead efficiency variance?

Indicate a favorable variance as a positive number and an unfavorable variance as a negative number.