13. In process of examining, occurred changes in total revenues, operating income and costs is known as

1.revenue analysis

2.costs analysis

3.operating income analysis

4.cost volume profit analysis

14. If contribution per unit is $900 and number of units sold is $70, then contribution margin will be

1.$97,000

2.$83,000

3.$63,000

4.$12,860

15. Data from a company's last period of operations shows sales of 2,000 units, total contribution margin of $50,000, and income after subtracting fixed costs of $30,000 is $20,000. Should the company experience sales of 2,400 units (within the relevant range, no sales price increase), net income will be:

1.$40,000

2. $30,000

3. $10,000

4. $20,000

Show all working and provide the response