Help Save & Exit Submit Petrus Framing's cost formula for its supplies cost is $1720 per month plus S10 per frame. For the month of March, the company planned for activity of 612 frames, but the actual level of activity was 616 frames. The actual supplies cost for the month was $8.050. The activity variance for supplies cost in March would be closest to: 2 Mutiple Choice 01:31:56 O $40 U O $40 F $210 F $210 U