An investment has an installed cost of $531,800. The cash flows over the four-year life of the investment are projected to be $217,850, $234,450, $201,110, and $149,820.

If the discount rate is zero, what is the NPV? (Omit $ sign in your response.)

NPV $ ______

If the discount rate is infinite, what is the NPV? (Negative answer should be indicated by a minus sign. Omit $ sign in your response.)

NPV $ ______

At what discount rate is the NPV just equal to zero? (Round the final answer to 2 decimal places.)

IRR ______%

Show calculation expressions and the trial-and-error process for all figures.