For the following ordinary annuity, determine the size of the periodic payment.

$\backslash$table$[[$Future Value,$\backslash$table$[[$Present$],[$Value$]],\backslash$table$[[$Payment$],[$Period$]],,$Con$],[-,$$$20,400\mathrm{.}00,1$ month,$\backslash$table$[[\backslash$table$[[$Term of Annuity Interest Rate$],[16$ years $9\mathrm{.}5\%$Conversion period $/$ monthly

Find payment $??$