An investment has an installed cost of $580,382. The cash flows over the four-year life of the investment are projected to be $209,584, $253,318, $201,674, and $169,313. If the discount rate is zero, what is the NPV? (Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32.) NPV $ If the discount rate is infinite, what is the NPV? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32.) NPV $ At what discount rate is the NPV just equal to zero? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Discount rate %