Raven Incorporated sells a single product for \$47. Variable costs include $27.66 for each unit plus a $9 selling expense per unit. Fixed costs are $219,560 per month. Required: a. What is the contribution margin rotio? b. What is the break-even sales revenue? c. What sales revenue is needed to achicve a $211,200 per month profit? Complete this question by entering your answers in the tabs below. What is the contribution margin ratio? Note: For all the requirements, do not round intermediate calculations: Frontier Corporation hos a contribution margin of $1,458,000 and net operating income of $364,500. What is its degree of operating leverage? Mutiple Choice 0.25 4.75 950 400 Frontier Corporation has a contribution margin of $800,000 and net operating income of of $200,000. If sales increase 30%, by what percentage waf profits increase? Mutpie Croice : 2000% 4000 12000% 16000%