Sales revenue - Fixed expenses = Operating income Requirement 2. What is Ronald's contribution margin ratio? Begin by identifying the formula to compute the contribution margin ratio. Contribution margin Sales revenue = Contribution margin ratio (Enter the ratio as a whole percent.) The contribution margin ratio is %. Begin by identifying the formula to compute the breakeven point in sales dollars. )=Breakevensalesindollars (Round your answer up to the nearest whole dollar.) The breakeven point in sales dollars is this campaign. Assuming that the projections are correct, what effect would this advertising campaign have on the company's annual operating income? If Ronald embarks on this advertising campaign, sales revenue and variable costs will will cause the contribution margin to by %. However, fixed costs will by by %, which due to the advertising. What effect would this advertising campaign have on Ronald's annual operating income