Raven Incorporated sells a single product for $52 Variable costs include $26.92 for each unit plus a $10 selling expense per unit Fored costs are $267,960 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 $295,510 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. What is the break-even sales revenue? Note: For all the requirements, do not round intermediate calculations. What sales revenue is needed to achieve a $295,510 per month profit? Note: For all the requirements, do not round intermediate calculations