A restaurant has a cafe and bar operation. The cafe provides 65% of to- tal sales revenue with a 48% variable cost. The bar provides 35% of to- tal sales revenue with a 38% variable cost. Answer the following: a. What is the contribution margin of the cafe? b. What is the contribution margin of the bar? c. What is the combined contribution margin of the cafe and bar? d. Assume the owner wants operating income to increase by $50,000, with the increase being provided jointly by the cafe and bar. What is the additional sales revenue required