The manager of Speedy Car Inspection reviewed the monthly operating costs for the past year. The costs ranged from $4,800 for 1,200 inspections to $3,800 for 700 inspections. Requirements 1. Use the high-low method to calculate the variable cost per inspection. 2. Calculate the total fixed costs. sarest cent.) 3. Write the equation and calculate the operating costs for 800 inspections. 4. Draw a graph illustrating your total cost under this plan. Show the costs at 700,800 , and 1,200 inspections. (Use the high-low method for all calculations.)