D Sherburne Snow Removal's cost formula for its vehicle operating cost is $2,510 per month plus $370 per snow-day. For the month of March, the company planned for activity of 18 snow-days, but the actual level of activity was 17 snow-days. The actual vehicle operating cost for the month was $8,460. The vehicle operating cost in the flexible budget for March would be closest to: $8,800 O $9,170 O $8,460 O $8,817