I dont need an explanation, just the answers ASAP

Assume that a company provided the following cost formulas for three of its expenses (Where qrefers to the number of hours worked): The company's planned level of activity was 2,000 hours and its actual level of activity was 1,850 hours. How much supplies expense would be included in the flexible budget? Multiple Choice, $12,900 $11100 $12,000. $11,400