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 US dollar) Miles Traveled by Month Tour Buses Cost November 15,600 19,000 reol December 17,800 19,300 January 20,000 19,450 February 24,400 19,900 March 31,900 21,100 April 13,900 18,400 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 48,000 tour miles are driven