Exercise 5-13 (Static) Changes in Selling Price, Sales Volume, Variable Cost per Unit, and Total Fixed Costs [LO5-1, LO5-4] Miller Company's contribution format income statement for the most recent month is shown below: Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 15%? 2. What is the revised net operating income if the selling price decreases by $1.50 per unit and the number of units sold increases by 25\%? 3. What is the revised net operating income if the selling price increases by $1,50 per unit, fixed expenses increase by $20,000, and the number of units sold decreases by 5% ? 4. What is the revised net operating income if the selling price per unit increases by 12%, variabie expenses increase by 60 cents per unit, and the number of units sold decreases by 10%