Whirly Corporations contribution format income statement for the most recent month is shown below:

	Total	Per Unit
Sales (7,500 units)	$ 225,000	$ 30.00
Variable expenses	135,000	18.00
Contribution margin	90,000	$ 12.00
Fixed expenses	54,600
Net operating income	$ 35,400

Required:

(Consider each case independently):

1. What would be the revised net operating income per month if the sales volume increases by 90 units?

2. What would be the revised net operating income per month if the sales volume decreases by 90 units?

3. What would be the revised net operating income per month if the sales volume is 6,500 units?

Please include profit formula for this question

Thank you.