10. Straight Framing's cost formula for its supplies cost is $1,640 per month plus $10 per frame. For the month of August, the company planned for activity of 570 frames, but the actual level of activity was 600 frames. The actual supplies cost for the month was $7,600. The supplies cost in the FLEXIBLE budget for August would be closest to: a. $7,340 c. $7,600 b. 7,440 d. 7,640 e. None of the above. The answer is