<?php

function valorFuturo($valorInicial, $taxaJuros, $periodo, $investimentoMensal)
{
    $jurosComposto = (1 + $taxaJuros) ** $periodo;
    $v1 = $valorInicial * $jurosComposto;
    $v2 = $investimentoMensal * ( ( $jurosComposto - 1 ) / $taxaJuros ) * ( 1 + $taxaJuros );
    return number_format($v1 + $v2, 2, ",", ".");
}

for($i = 0; $i <= 360; $i++){
	echo "Valor no $i mes: R$ ".valorFuturo(43700, .005431690, $i, 400)."\n";
}