Miller Company's contribution format income statement for the most recent month is shown below: Sales (30,000 units) Total $ 210,000 Per Unit $ 7.00 Variable expenses Contribution margin Fixed expenses Net operating income 120,000 90,000 4.00 $ 3.00 47,000 $ 43,000 Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 20%? 2. 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 21%? 3. What is the revised net operating income if the selling price increases by $1.40 per unit, fixed expenses increase by $8,000, and the number of units sold decreases by 3%? 4. What is the revised net operating income if the selling price per unit increases by 20%, variable expenses increase by 10 cents per unit, and the number of units sold decreases by 8%? 1. Net operating income 2. Net operating income 3. Net operating income 4. Net operating income