Miller Companys contribution format income statement for the most recent month is shown below: Total Per Unit Sales (24,600 units) $ 221,400 $ 9.00 Variable expenses 132,840 5.40 Contribution margin 88,560 $ 3.60 Fixed expenses 51,660 Net operating income $ 36,900 Required: (Consider each of the four requirements independently): Assume the sales volume increases by 3,690 units: What is the revised net operating income? What is the percent increase in unit sales? Using the most recent months degree of operating leverage, what is the percent increase in net operating income? What is the revised net operating income if the selling price decreases by $1.30 per unit and the number of units sold increases by 21%? What is the revised net operating income