In order to determine the sales revenue level needed to reach a specific target operating income goal, it is necessary to add the targeted income amount to what other element before dividing the sum by contribution margin? Variable costs Overhead costs Fixed costs Contribution margin Question 5 A weighted average contribution margin is a very useful statistic for a company that has which of the following? A dwinding contribution margin more products than they need An increasing proportion of fixed costs in its cost structure. Multiple product lines with a sales mix Insufficient sales to reach break-even