title: How to sum values?
body: <p>I have this list</p>
  
  <pre><code>mylist = [[1.0, 10.0], 
            [20.0, 1135.0], 
            [3.0, 5.0]]
  </code></pre>
  
  <p>I want to get total by column like 24.0, 1150.0</p>
  
  <p>can anyone help me?</p>