Rio Bus Tours has incurred the following bus maintenance costs during the recent tourist season. (The rea/ is Brazil's national monetary unit. On the day this exercise was written, the rea/ was equivalent in value to 0.2545 U.S. dollar.) 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 46,000 tour miles are driven