JSFiddle - React, Tailwind, and code Playground

HTML

<table id="example" class="display table" cellspacing="0" width="100%">
  <thead>
    <tr>
      <th></th>
      <th>Name</th>
      <th>Position</th>
      <th>Office</th>
      <th>Age</th>
      <th>Start date</th>
      <th>Salary</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td class="details-control"></td>
      <td>Tiger Nixon</td>
      <td>System Architect</td>
      <td>Edinburgh</td>
      <td>61</td>
      <td>2011/04/25</td>
      <td>$320,800</td>
    </tr>
    <tr>
      <td class="details-control"></td>
      <td>Garrett Winters</td>
      <td>Accountant</td>
      <td>Tokyo</td>
      <td>63</td>
      <td>2011/07/25</td>
      <td>$170,750</td>
    </tr>
    <tr>
      <td class="details-control"></td>
      <td>Ashton Cox</td>
      <td>Junior Technical Author</td>
      <td>San Francisco</td>
      <td>66</td>
      <td>2009/01/12</td>
      <td>$86,000</td>
    </tr>
  </tbody>
</table>
<div class="total">
    Total: <span id="spn-total">0</span>
</div>

CSS

table.table {
    border-collapse: collapse;
}

table.table th, .total {
    padding: 6px;
    background-color: #ccc;
}

table.table td {
    padding: 2px 6px;
    border: solid 1px #c9c8c4;
}

.total {
    margin-top: 10px;
    display: inline-block;
    float: right;
}

JavaScript

(function ($) {
    //DOM ready
    $(function() {
        var last_col, values, total;
        
        //get last <td> in all rows
        last_col = $("#example tbody tr td:last-child");
        
        //get the values in all <td> as an array of numbers
        values = $.map(last_col.get(), function (td) {
            return +$(td).text().replace(/[\$\,\s]/g, "") || 0;
        });
        console.log(values);
        
        //sum the values
        total = values.reduce(function (prev, current) { 
            return prev + current;
        }, 0 /*starts prev*/);
        
        $("#spn-total").text(total);
    });
}(jQuery));