Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,300 units) Variable expenses Total $248,200 146,000 Contribution margin 102,200 Fixed expenses 56,000 Net operating income $ 46,200 Per Unit $ 34.00 20.00 $ 14.00 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 80 units? 2. What would be the revised net operating income per month if the sales volume decreases by 80 units? 3. What would be the revised net operating income per month if the sales volume is 6,300 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income