title: Do math on html data - Add all contents of <li> tags
body: <p>I have the following html:</p>
  
  <pre><code>&lt;div id="list"&gt;
  &lt;ul&gt;
  &lt;li&gt;45.00&lt;/li&gt;
  &lt;li&gt;45.00&lt;/li&gt;
  &lt;/ul&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Is there any way to take the contents of those list items and add them using javascript/jQuery?</p>