JSFiddle - React, Tailwind, and code Playground

by ipr101

HTML

<table border="1">
<tr>
 <td class="mcount_el">2</td>
 <td class="mprice_el">544,33</td>
 <td class="mcost_el">0</td>
</tr>
<tr>
 <td class="mcount_el">3,9</td>
 <td class="mprice_el">460,00</td>
 <td class="mcost_el">0</td>
</tr>
</table>

JavaScript

var count=0;
var price=0;
$('tr').each(function(){
      count=parseFloat($(this).find('td.mcount_el').text().replace(",","."));
  price=parseFloat($(this).find('td.mprice_el').text().replace(",","."));
      $(this).find('td.mcost_el').html(count*price);
});