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

	Total			Per Unit
Sales (40,000 units)	$	240,000		$	6.00
Variable expenses		120,000			3.00
Contribution margin		120,000		$	3.00
Fixed expenses		40,000
Net operating income	$	80,000

Required:

(Consider each case independently):

1. What is the revised net operating income if unit sales increase by 17%?

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 20%?

3. What is the revised net operating income if the selling price increases by $1.30 per unit, fixed expenses increase by $9,000, and the number of units sold decreases by 2%?

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 10%?