Kent County Company produces a single product. The standard cost card for the product follows:

Direct material $q,3$ pounds @ $$4/$pound $=$$$12$ per unit

Direct labor $q,2$ hours @ $$8/$hour $=$$$16$ per unit

Variable overhead $q,2$ hours @ $$5$ hour $=$$$10$ per unit

During a recent period the company produced $500$ units of product. Various costs associated with the production of these units are given below:

Units produced $q,$

Direct material used $q,$

Direct material purchased $(3,000$ pounds$)q,$ Direct labor cost $(950$ hours$).q,$

Variable overhead cost incurred $q,$

$500$

$1,600$ pounds

$$12,300$

$$7,790$

$$4,655$

The variable overhead efficiency variance is: