Rio Bus Tours has incurred the following bus maintenance costs during the recent tourist season. (The real is Brazil's national monetary unit. On the day this exercise was written, the real was equivalent in value to 0.2545 U.S. dollar.) Month November Miles Traveled by Tour Buses Cost 17,700 real 13,650 December 16,500 18,000 January 19,350 18,150 February 23,100 18,600 March 30,600 19,800 April 12,600 17,100 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 company's maintenance cost. 3. Predict the level of maintenance cost that would be incurred during a month when 35,000 tour miles are driven