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 = [tex]1840+(12\times624)[/tex] = $9328
But the actual level of activity for the month of March = 631 frames
Therefore, supplies cost on actual frames = [tex]1840 +(12\times631)[/tex] = $9412
The variance is = [tex]9412-9328[/tex]= $84 U Â (option B)