Carla Vista Company reports the following operating results for the month of August: sales $288,000 (units 5,000); variable costs $208,320; and fixed costs $67,200, Management is considering the following independent courses of action to increase operating income: Calculate the operating income that would be earned under each alternative. Which course of action will produce the highest operating income? Carla Vista Seating Co., a manufacturer of chairs, had the following data for 2022 : (a) Calculate the contribution margin ratio. Calculate the operating income that would be earned under each alternative. Which course of action will produce the highest operating income