title: LibreOffice Calc count the number of distinct occurrences
body: <p>What formula in LibreOffice Calc will count the number of distinct Week_Number occurrences?  The answer should be 2.</p>
  
  <p><a href="https://i.stack.imgur.com/GfX3V.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GfX3V.png" alt="enter image description here"></a></p>