Help Save & E TB MC Qu. 9-198 Courington Detailing's cost formula for its materials... ormula for its materials and supplies is $1.880 per month plus $7 per vehicle. For the month of August, the company planned for activity of 83 vehicles, but the actual level of actvity was 48 vehnicles. The actual materals and supplies for the month was $2.350 The materials and supplies in the fiexible budget for August would be closest to $2,350 $1,351 $2,461 Prev 3f Next