Whirly's contribution format income statement for the most recent month is shown below: Sales (11,200 units) Variable expenses Contribution margin Fixed expenses Operating income Total $448,000 168,000 280,000 255,000 $ 25,000 Per Unit $40.00 15.00 $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 if the sales volume increases by 110 units? 2. What would be the revised operating income per month if the sales volume decreases by 205 units? 3. What would be the revised operating income per month if the sales volume is 10.200 units? 1. Revised operating income 2 Revised operating income 3 Revised operating income