title: sharepoint list validation with multiple operators
body: <p>I have a SharePoint list with two numeric fields Sunday and Monday and a currency field rate per job.
  I want to validate the list, so that the rate per job is greater than zero.
  I also want to check that either Sunday or Monday is greater than zero.
  How do I do this using the AND and OR operators?  This is what I tried.</p>
  <pre><code>=OR(=AND([RatePerJob]&gt;0,[RatePerJob]&lt;50),([Sun]&gt;0 , [Mon]&gt;0))
  </code></pre>
  <p>I'm using SharePoint Online.</p>