Answer:
Option B. $84 U is the answer.
Step-by-step explanation:
Petrus Framing's cost formula for its supplies cost is $1,840 per month plus $12 per frame.
Standard supplies cost for the month of March is = = $9328
But the actual level of activity for the month of March = 631 frames
Therefore, supplies cost on actual frames = = $9412
The variance is = = $84 U (option B)