For any airline of interest, compute its 2010 marketing ROS, marketing ROI, and operating income (as a

Question:

For any airline of interest, compute its 2010 marketing ROS, marketing ROI, and operating income (as a percentage of sales) using the airline's 2010 income statement in its annual report. Assume marketing and sales expenses are 75 percent of SGA expenses. Then plot the results in Figure 2-24 and interpret the airline's performance.