I have a table that has 8457 rows, within the table there are 12
models, and within each model there are 5 phases for development.

What I'm trying to do is place a formula into a table that will
summarize the data I'm looking at by extracting the beginning date
and
ending date of the phase - take the difference of the two to provide
the duration of that phase.


Some example data below:


Boat Phase Activity Desc Start Finish
205 Phase 1 Port Bow Lid Plug 1/1/2006 1/31/2006
205 Phase 1 Sun Lounge Mill 1 1/15/2006 2/12/2006
205 Phase 2 Sun Lounge Foam 2 2/16/2006 2/18/2006
205 Phase 2 STB Bow Lid Plug 2/11/2006 5/5/2006
205 Phase 2 Anchor Lid Plug 3/14/2006 4/12/2006
205 Phase 3 Sport Deck / Buck 5/1/2006 8/3/2006
205 Phase 3 Motor Apply Steel 8/7/2006 8/8/2006
205 Phase 3 Sun Lounge Mill 2 8/14/2006 8/18/2006
391 Phase 1 Sport Deck Buck 9/14/2006 1/13/2007
391 Phase 1 Helm Panels Design 9/28/2006 1/25/2007
391 Phase 2 Electrical Tech 1/29/2007 1/31/2007
391 Phase 2 W/S Install on plug 1/24/2007 4/17/2007
391 Phase 2 Liner Paint 1 2/24/2007 3/25/2007
391 Phase 3 Hull Mold Install 4/13/2007 7/16/2007
391 Phase 3 Sport Deck Mill 2 7/20/2007 7/21/2007
391 Phase 3 Sport Deck Foam 7/27/2007 7/31/2007


So then in a summary table below would be said formula:


Boat Phase 1 Phase 2 Phase 3
205 42 83 109
391 133 83 109


So cell B2 would represent the MAXIMUM for phase 1 of the 205
(2/12/2006) minus the MINIMUM for phase 1 for the 205 (1/1/2006)
which
is 42 days. Etc Etc Etc for the remaining cells.


Any help would be greatly appreciated.


-Steve