The operating revenues of the three largest business segments for Time Warner, Inc. (TWX), for a recent year follow. Each segment includes a number of businesses, examples of which are indicated in parentheses. Time Warner, Inc. Segment Revenues (in millions) Turner (cable networks and digital media) Home Box Office (pay television) Warner Bros. (films, television, and videos) $11,364 5,890 13,037 Assume that the variable costs as a percent of sales for each segment are as follows: Turner 40% Home Box Office Warner Bros. 35% 25% a. Determine the contribution margin and contribution margin ratio. Enter amounts in millions. When required, round to the nearest whole millionth (for example, round 5,688.7 to 5,689). Round contribution margin ratio to the nearest whole percent for each segment from the information given. Turner 11,364.00 Warner Bros. 13,037 Home Box Office Revenues 5,890.00 Variable costs 4,545.6 X 2,061.5 X 3,259.25 X Contribution margin 6,818.40 X 3,828.50 X 9,777.75 X Contribution margin ratio (as a percent) 60 % 65 % 75 %