What can the weighted average contribution margin ratio be used for? Multiple Choice To calculate an average per-unit contribution margin based on an assumed sales mix. To figure out the relative proportion in which a company's products (or services) are sold. To solve for a measure, at any level of sales volume, of the sensitivity of operating profit to changes in volume. To determine the extent of fixed costs in an organization's cost structure. Breakeven and profit planning for sales volume expressed in dollars (Y) rather than units (Q)