Miller Company's contribution format income statement for the most recent month is shown below: Sales (36,000 units) Variable expenses Total $ 252,000 Per Unit $7.00 4.00 144,000 Contribution margin 108,000 $ 3.00 Fixed expenses 41,000 Net operating income. $ 67,000 Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 13%? 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 22%? 3. What is the revised net operating income if the selling price increases by $1.40 per unit, fixed expenses increase by $6,000, and the number of units sold decreases by 7%? 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 14%? 1. Net operating income 2. Net operating income 3. Net operating income 4. Net operating income