O If fixed costs are $100,000 and weighted-average unit contribution margin is $50, then the break-even point in units is 2,000 units. O If Conan Corporation sells two products with a sales mix of 75% -25%, and the respective contribution margins are $100 and $300, then weighted-average unit contribution margin is $150. The weighted-average contribution margin cannot be used to calculate break-even sales for a mix of two or more products. O The weighted-average contribution margin of all the products is calculated when determining the break-even sales for a multi-product firm.