The manager of Quick Car Inspection reviewed the monthly operating costs for the past year. The costs ranged from $4,500 for 1,000 inspections to $4,100 for 800 inspections. Read the requirements Requirement 1. Use the high-low method to calculate the variable cost per inspection. Select the formula and enter the amounts to calculate the variable cost per inspection. (Round to the nearest cent.) Variable cost per inspection 0 Requirements . 1. Use the high-low method to calculate the variable cost per inspection 2. Calculate the total fixed costs. 3. Write the equation and calculate the operating costs for 900 inspections. 4. Draw a graph illustrating your total cost under this plan. Show the costs at 800, 900, and 1,000 inspections. (Use the high-low method for all calculations.)