Find the equated date at which the original payments are equivalent to the single payment. State your answer in years and months $($from $0$ to $11$ months$).$

$\backslash$table$[[$Original Payments,Interest,Frequency of$,$Single Payment$],[,$Rate,Conversion,$],[\backslash$table$[[$$$878\mathrm{.}00$ due today and$],[$$$871\mathrm{.}00$ due in $5$ years$]],4\%,$quarterty,$$1842\mathrm{.}03$