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

	Total	Per Unit
Sales (40,000 units)	$ 200,000	$ 5.00
Variable expenses	80,000	2.00
Contribution margin	120,000	$ 3.00
Fixed expenses	48,000
Net operating income	$ 72,000

Required:

(Consider each case independently):

1. What is the revised net operating income if unit sales increase by 10%?

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 22%?

3. What is the revised net operating income if the selling price increases by $1.30 per unit, fixed expenses increase by $5,000, and the number of units sold decreases by 7%?

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%?