Creative Framing's cost formula for its supplies cost is $1,830 per month plus $15 per frame. For the month of November, the company planned for activity of 952 frames, but the actual level of activity was 920 frames. The actual supplies cost for the month was $13,500. The supplies cost in the flexible budget for November would be closest to: Select one: A. $15,630 B. $13,086 C. $16,110 D. $13,500