title: Complex formula in excel
body: <p>I need a solutions please.
  I have a column with numbers and text in excel.
  I want to calculate SUM of consecutive numbers without interrupting by text.</p>
  
  <p>I have attached an example here: <a href="https://onedrive.live.com/redir?resid=2BDE6C5D10A581D!9129&amp;authkey=!ALQT8PabZUFzn9k&amp;ithint=file%2Cxlsx" rel="nofollow">demo excel document</a></p>
  
  <p>I want to find a formula to calculate red numbers.</p>