The following information summarizes the company's cost structure. Required: Estimate the following costs at the 40,000 unit level of activity. a. Total variable cost. b. Total fixed cost. c. Variable cost per unity. d. Fixed cost per unit. Sloanker Inc. has provided the following data concerning its maintenance costs. Management believes that maintenance cost is a mixed cost that depends on machine-hours. Required: Estimate the variable cost per machine-hour and the fixed cost per month using the high-low method. Show your work