Sales (39,000 units) Variable expenses Contribution margin Fixed expenses Met operating income Total $ 390,00 273,000 117,000 42,800 $ 75,000 Per Unit $10.00 7.00 $ 3.00 Required: (Consider each case independently 1 What is the revised net operating income if unit sales increase by 11%? 2. What is the revised net operating income if the selling price decreases by $1.20 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 $1.20 per unit, fixed expenses increase by $6,000, 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 10%, variable expenses increase by 40 cerits per unit, and the number of units sold decreases by 15%? 1. Net operating income 2. Net operating income 3. Net operating income 4. Net operating income