Beakins Corporation produces a single product. The standard cost card for the product follows:

During a recent period the company produced 1,200 units of product. Various costs associated with the production of these units are given below:

The company records all variances at the earliest possible point in time. Variable manufacturing overhead costs are applied to products on the basis of standard direct labor-hours. The variable overhead rate variance for the period is:

$1,680 F

$1,680 U

$1,440 F

$1,440 U