Can someone please show me what I'm doing wrong?

Miller Company's contribution format income statement for the most recent month is shown below: Sales (36,000 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 252,000 144,000 108,000 48,000 $ 60,000 Per Unit $ 7.00 4.00 $3.00 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 $1.20 per unit and the number of units sold increases by 19%? 3. What is the revised net operating income if the selling price increases by $1.20 per unit, fixed expenses increase by $10,000, 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 20 cents per unit, and the number of units sold decreases by 7%? * Answer is complete but not entirely correct. $ Net operating income Net operating income Net operating income Net operating income $ $ 76,200 159,288 34,569 1,723 $