The manager of Swift Car Inspection reviewed the monthly operating costs for the past year. The costs ranged from

$ 4100 for 1100 inspections to $ 3,700 for 700 inspections.

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

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 700, 900 and 1100 inspections.