Answer: Is useful to managers in planning and decision making.
Explanation:
The Contribution approach to the income statement helps the company understand better the behaviour of it's variable and fixed assets because the Contribution Margin approach first subtracts variable costs from revenue and then subtracts fixed costs.
This allows the company to know which of the costs are more taxing on the company thereby enabling the company to know which to work on. It is therefore useful to managers in planning and decision making.