Problem $9-18$ NPV and Discount Rates $($LO$1)$

An investment has an installed cost of $$517,800.$ The cash flows over the four$-$year life of the investment are projected to be $$231,850,$ $$248,450,$ $$215,110,$ and $$163,820.$

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

NPV $ $463610\mathrm{.}99$ Numeric Response $1.$Edit Unavailable. $463610\mathrm{.}99$ incorrect.

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 $ $-517800$ Numeric Response $2.$Edit Unavailable. $-517800$ correct.

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

IRR $\%$