Whirly's contribution format income statement for the most recent month is shown below: Sales (10,700 units) Variable expenses Contribution margin Fixed expenses Operating income Total $481,500 214,000 267,500 242,500 $ 25,000 Per Unit $45.00 20.00 $25,00 Required: Consider each case Independently, You need not prepare a new income statement. Instead, use the incremental approach where possible 1. What would be the revised operating income per month of the sales volume increases by 90 units? 2. What would be the revised operating Income per month if the sales volume decreases by 195 units? 3. What would be the revised operating income per month if the sales volume is 9700 units? 1 Revised operating income 2 Revised operating income 3 Revised operating income