Can you please walk me through this?

Exercise 5-13 (Algo) Changes in Selling Price, Sales Volume, Variable Cost per Unit, and Total Fixed Costs [LO5-1, LOS-4] Miller Company's contribution format income statement for the most recent month is shown below: Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 18% ? 2. What is the revised net operating income if the selling price decreases by $110 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 $110 per unit, fixed expenses increase by $7,000, 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 cents per unit, and the number of units sold decreases by 7%