Miller Companys contribution format income statement for the most recent month is shown below: Total Per Unit Sales (24,000 units) $ 216,000 $ 9.00 Variable expenses 129,600 5.40 Contribution margin 86,400 $ 3.60 Fixed expenses 50,400 Net operating income $ 36,000 Required: (Consider each of the four requirements independently): Assume the sales volume increases by 4,320 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 $1.40 per unit and the number of units sold increases by 24%? What is the revised net operating income