Jabroni is considering an investment project with the cash flows of $-300($the initial cash flow$),800($cash flow at year $1),-200($cash flow at year $2).$ Given the discount rate of $10\%,$ compute the Modified Internal Rate of Return $($MIRR$)$ using the discounting approach.

$71\mathrm{.}94\%$

$50\mathrm{.}55\%$

$19\mathrm{.}72\%$

$37\mathrm{.}52\%$