10-8,An investment has an installed cost of $684,680. The cash flows over the four-year life of the investment are projected to be $263,279, $294,060, $227,604, and $174,356. If the discount rate is zero, the NPV is $______. If the discount rate is infinite, the NPV is $______. At a discount rate of ______ percent, the NPV is just equal to zero. (Do not include the percent sign (%) and dollar signs ($). Negative amount should be indicated by a minus sign. Round your answers to 2 decimal places. (e.g., 32.16)), ,