Total Per Unit Sales (43,000 units) $ 301,000 $ 7.00 Variable expenses 172,000 4.00 Contribution margin 129,000 $ 3.00 Fixed expenses 47,000 Net operating income $ 82,000 Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 19%? 2. 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 16%? 3. What is the revised net operating income if the selling price increases by $1.30 per unit, fixed expenses increase by $8,000, and the number of units sold decreases by 7%? 4. What is the revised net operating income if the selling price per