The manager of Speedy Car Inspection reviewed the monthly operating costs for the past year The costs ranged from $4,300 for 1,300 inspections to $3.900 for 900 inspections Read the requirements Requirement 1. Use the high-low method to calculate the vanable cost per inspection Select the formula and enter the amounts to calculate the variable cost per inspection (Round to the nearest cent) Change in total cost Change in volume of activity = Variable cost per inspection S 400 400 5 100 Requirement 2. Calculate the total fixed costs Select the formula and enter the amounts to calculate the total fixed costs (Use the highest volume and its mixed cost to calculato the total fixed cost) Total fixed cost