Rio Bus Tours has incurred the following bus maintenance costs during the recent tourist season. (The real is Brazils national monetary unit. On the day this exercise was written, the real was equivalent in value to 0.2545 U.S. dollar.)

Month	Miles Traveled by Tour Buses			Cost
November		15,150			18,700		real
December		17,500			19,000
January		19,850			19,150
February		24,100			19,600
March		31,600			20,350
April		13,600			18,100

Required: 1. Use the high-low method to estimate the variable cost per tour mile traveled and the fixed cost per month. 2. Develop a formula to express the cost behavior exhibited by the companys maintenance cost. 3. Predict the level of maintenance cost that would be incurred during a month when 45,000 tour miles are driven.