title: Selecting a specific number of rows, from a given cell
body: <p>I am trying to select a specific number of rows inside table.</p>
  
  <p>I have something like this:</p>
  
  <pre><code>1
  2 
  3
  4
  5
  6
  =SUM() 
  </code></pre>
  
  <p>How can I write the sum function so that it sums all the numbers in the cells from the row where =sum() function is, to upwards x rows.</p>
  
  <p>Thanks.  </p>