Tysor Framing's cost formula for its supplies cost is $3,070 per month plus $15 per frame. For the month of July, the company planned for activity of 940 frames, but the actual level of activity was 948 frames. The actual supplies cost for the month was $17,113. The spending variance for supplies cost in July would be closest to:

$57 U

$177 F

$57 F

$177 U