the aim is store once, not store multiple times
Remember... Optimize 'til you die!
Progaming environment: Access based on my own environment: DAO3.6/A97/A2000/A2003/A2007/A2010 VB based on my own environment: vb6 sp5 ASP based on my own environment: 5.6 VB-NET based on my own environment started 2007 SQL-2005 based on my own environment started 2008 MYLE YOUR PASSWORD IS JUST LIKE YOUR TOOTHBRUSH DON'T SHARE IT.
Adjust ranges as needed. Also you may need to work with date formats. It might be easier to set up start and end dates in two cells (i.e. D1 is start date, then D2 is End Date), and category in D3, then your formula would be: