where does this $70\mathrm{.}61\%$ and $-19\mathrm{.}82\%$ and $49\mathrm{.}21\%$ come from?$\backslash$table$[[$Year$,\backslash$table$[[$Cash Flow$],[$Before Tax$]],$Income Tax,Futures,Total$],[$Actual$,$Discounted,Actual,Discounted,Actual,Discounted,Actual,Discounted$],[1,$$$647\mathrm{.}94,$$$568\mathrm{.}83,($$$148\mathrm{.}12),($$$130\mathrm{.}04),$$$0\mathrm{.}00,$$$0\mathrm{.}00,$$$499\mathrm{.}82,$$$438\mathrm{.}80$