somar-elementos.js

$(".selectFreq").on('change', function(){
	alert('ok');
	var soma = 0;
    $(".servicos").each(function(x){
        var val = $(this).val();

        if(!val || isNaN(val))
            return false;

        soma = soma+parseFloat(val);
    });
    soma = soma.toFixed(2);
    $("#VlrTot").val(soma);
});