2.20 (LO 2) Excel Scattergraph; high-low method; cost estimation The Aust Corporation has gathered the following data on its copy machine costs for the first eight months of the year. Required a. Prepare a scattergraph of the cost information and then choose a line that you believe best represents the cost function. Represent your chosen line with a cost equation of the form y=mx+b. Show your calculations. b. Using the high-low method, what is the variable cost per copy? c. Using the high-low method, what is the fixed cost per month? d. Using the high-low method, represent the cost function with a cost equation of the form y=mx+b. e. Using your cost equation from part (d), provide your best estimate of the copy costs for September if 62,000 copies will be made. Why does your estimate differ from the $5,800 cost incurred in June