6. Calculate the net present value with a required return of 10%, an initial investment of $30,000, and 10 years of payments of $6,000 each.

7. Calculate the net present value with a required return of of 8%, an initial investment of $45,000, and cash flows of $12,000, $20,000, $10,000, and $6,000 for years 1 through 4 respectively.

8. Given the following information, a required return of 8%, an initial investment of $45,000, and cash flows of $12,000, $20,000, $10,000, and $6,000 for years 1 through 4, should the investment be done?

9. Calculate the net present value with a required return of 5%, an initial investment of $45,000, and cash flows of $9,000, $8,000, $15,000, and $20,000 for years 1 through 4 respectively.

10. Given the following information, with a required return of 5%, an intial investment of $45,000, and cash flows of $9,000, $8,000, $15,000, and $20,000 for years 1 through 4 respectively.

11. Calculate break-even given the following information: sales per unit of $25, variable costs of $13, fixed costs of $15,000. Remember, you cannot have partial units, so you will need to round up if the answer is a decimal.

12. Calculate break-even given the following information: sales per unit of $40, variable costs of $15, fixed costs of $15,000, and a desired profit of $20,000. Remember, you cannot have partial units, so you will need to round up if the answer is a decimal.