please answer 28

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 unit. d. Fixed cost per unit Stonaker 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