title: Change a value in a cell from a checkbox
body: <p>I have a value in one table and a checkbox in another. I would like the value to go up by 1 when the box is checked. I want to do something like this:</p>
  
  <pre><code>=IF(C23,B4=B4+1)
  </code></pre>
  
  <p>but Excel throws an error. C23 is the checkbox and B4 is the number.</p>