I need help on questions 14 & 15. (Multiple choice)

QUESTION 14 Which of the following formulas is used to calculate break-even point in units? O Break-even point in units - Total costs / Unit contribution margin O Break-even point in units - Sales / Fixed costs Break-even point in units - Sales / Unit variable cost . Break-even point in units - Total fixed costs / (Price - Unit variable cost) QUESTION 15 Which of the following is NOT a use of CVP (Cost-Volume-Profit) analysis? the ability to conduct sensitivity analysis of cost or price changes the identification of price and efficiency variances how many units must be sold to break even what is the impact on the break-even point of an increase or decrease in fixed costs