Miller Company's contribution format income statement for the most recent month is shown below: Total Per Unit Sales (22,800 units) $ 205,200 $ 9.00 Variable expenses 123,120 5.40 Contribution margin 82,080 $ 3.60 Fixed expenses 47,880 Net operating income $ 34,200 Required: (Consider each of the four requirements independently): Assume the sales volume increases by 3,648 units: What is the revised net operating income? What is the percent increase in unit sales? Using the most recent month's 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 23%? What is the revised net operating income if the selling price increases by $1.30 per unit, fixed expenses increase by $10,000, and the number of units sold decreases by 4%