Month January February March $ Number of Oil Changes Operating Expenses 3,900 $ 38,500 3,300 34,500 3,500 $ 35,500 3,400 $ 35,000 4,300 $ 39,500 3,600 $ 36,000 April ..... May... June Use the high-low method to determine the variable and fixed cost components of Swift Lube's operating costs. Use this information to project the monthly operating costs for a month in which the company performs 4,100 oil changes. E (Click the icon to view the data.) C. Use the high-low method to determine the variable and fixed costs components of Swift Lube's operating cost equation. First identify the formula and calculate the variable cost component (slope). (Round your answer to the nearest cent.) Variable cost per unit Change in costs Change in volume Total fixed cost Total mixed cost Total variable cost Variable cost per unit