title: Is it possible to assign a value to a cell when saving an excel file?
body: <p>The point would be to automatically keep a "last" value (without, the human-error-prone: "just remember to do it" method), so that when changes are made the next time the spreadsheet is updated, they can be easily compared.</p>
  
  <p>Update: </p>
  
  <p>I'd still prefer to do this without macros, if possible.</p>
  
  <p>But, since that's apparently not possible; what would the macro look like to do this?</p>