JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td class="monetary" data-bind="text: totalLabel">R$ 75,22</td>
    </tr>
</table>

JavaScript

var td = document.querySelector(".monetary");
var preco = td.innerHTML.match(/\d+,\d+/)[0];

alert(preco);