What is the Net Present Value $($NPV$)$ and internal rate of return $($IRR$)$ of spending $$500$

today on an energy efficient appliance which will save you $$185$ a year for the next five

years assuming you could invest this money elsewhere and earn $14\%?$

$NPV=$$$135\mathrm{.}12$;$|RR|=24\mathrm{.}8\%$

$NPV=($$$635\mathrm{.}12)$;IRR$=(77\mathrm{.}1\%)$

$NPV=$$$635\mathrm{.}12$;$|RR|=77\mathrm{.}1\%$

$NPV=($$$135\mathrm{.}12)$;IRR$=(24\mathrm{.}8\%)$

$NPV=$$$393\mathrm{.}49$;IRR$=39\mathrm{.}1\%$