Use the high-low method to determine the variable and fixed cost components of Rapid Change's operating costs. Use this information to project the monthly operating costs for a month in which the company performs 3,100 oil changes. (Click the icon to view the data.) Use the high-low method to determine the variable and fixed costs components of Rapid Change's operating cost equation. First identify the formula and calculate the variable cost component (slope). (Round your answer to the nearest cent.). Change in costs Change in volume Variable cost per unit