Nora Incorporated sells a single product for $22. Variable costs include $8.58 for each unit plus a 8% sales commission. Fixed costs are $155,290 per month. Required: a. What is the contribution margin ratio? b. What is the break-even sales revenue? c. What sales revenue is needed to achieve a $118,720 per month profit? Complete this question by entering your answers in the tabs below. Required A Required B Required C What is the contribution margin ratio? Contribution Margin Required A Required B >