Whirly Corporation's contribution format income statement for the most recent month is shown below: Total Per Unit Sales (8,200 units) $270,600 $33.00 Variable expenses 155,800 19.00 Contribution margin 114,800 $14.00 Fixed expenses 54,200 Net operating income $60,600 1 points eBook Hint Prim Aleferences Required: (Consider each case independently): What would be the revised net operating income per month if the sales volume, increases by 70 units? What would be the revised net operating income per month if the sales volume decreases by 70 units? What would be the revised net operating income per month if the sales volume is 7,200 units?