please answer all 4 multiple choice questions

Which of the following equations is used to calculate the break-even units? a. Break-Even Units = Total Fixed Cost / Price per Unit b. Break-Even Units = Total Fixed Cost / Variable Cost per Unit c. Break-Even Units = Total Variable Cost / (Price - Fixed Cost per Unit) d. Break-Even Units = Total Fixed Cost / (Price - Variable Cost per Unit) CE Contribution margin is the difference between: O a. sales and fixed expense. O b. variable expenses and fixed expense. O c. sales and variable expense. O d. variable expense and operating income. Kelly Company sells its only product for $250 per unit. It has variable costs of $100 per unit. Annual fixed operating costs amount to $16,500,000. Kelly's break-even point in units is: a. 110,000 b. 166,000 O c. 96,800 d. 65,405 In multiple-product break-even analysis, the sales mix is determined through: a. DuPont analysis. b. trend analysis. c. common-size analysis. d. sensitivity analysis