Question 5 Homework 0 Unanswered Which of the following is true? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Total xed costs vary exactly as the level of production varies. b Variable costs are fixed per unit. c The contribution margin per unit varies as the number of units varies. d Fixed costs are fixed per unit. a Question 6 Homework 0 Unanswered Which of the following is true? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Total fixed costs vary as the level of production varies. b Contribution margin per unit varies with the level of production. c Fixed costs per unit are fixed and not dependent on the level of production. d Variable costs per unit are fixed