JSFiddle - React, Tailwind, and code Playground
HTML
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>JavaScript
$(document).ready(function(){
var ulterioreSaldo = "0.01";
var saldo = "0.0";
var anticipo = "4499.48";
var sum = parseFloat(ulterioreSaldo) + parseFloat(saldo) + parseFloat(anticipo);
alert(sum);
});