21. It is the contribution margin that contributes to the bottom line on income statement after covering fixed costs.

1. True
2. False

22. On the contribution-margin income statement, variable period costs (such as percentage sales commission, etc.) are not included in variable expenses.

1. True
2. False

23. Unit contribution margin ratio is necessarily the same as contribution margin ratio.

1. True
2. False

24. For any volume of sales, contribution margin ratio is not the same across.

1. True
2. False