Miller Companys contribution format income statement for the most recent month is shown below:

	Total			Per Unit
Sales (20,000 units)	$	300,000		$	15.00
Variable expenses		180,000			9.00
Contribution margin		120,000		$	6.00
Fixed expenses		70,000
Net operating income	$	50,000

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 $1.50 per unit and the number of units sold increases by 25%?

3. What is the revised net operating income if the selling price increases by $1.50 per unit, fixed expenses increase by $20,000, 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 12%, variable expenses increase by 60 cents per unit, and the number of units sold decreases by 10%?