Consider the following data: Fixed costs = $10,000,000. Variable cost per unit = $400. Revenue per unit = $1,200. For the organization in Question 19, and within the relevant range, which of the following statements is most correct? a. Higher volume leads to higher total costs. b. Higher volume leads to higher average costs. c. Higher volume leads to a higher variable cost per unit. d. Higher volume leads to a higher contribution margin per unit. e. None of these statements is correct.