Thanks Ron,
That helped but I have another problem when it is a negetive it goes back to
23:59

Date Store Actual Arrival Time Est Arrival Time Variance
4/15/2010 33035 8:00:00 PM 8:00:00 PM 0:00
4/15/2010 34287 8:46:00 PM 8:45:00 PM 23:59
4/15/2010 39210 9:28:00 PM 9:36:00 PM 0:08
Cheers!!
"Ron Rosenfeld" wrote:

On Wed, 19 May 2010 08:59:01 -0700, Norm
wrote:

I have read all the other threads on this subject and they work fine for me
untill I need to cross midnight and the value is the time subtracted from 24
here are the cells:
Date Store Actual Arrival Time Est Arrival Time Variance
4/6/2010 33369 11:26:00 PM 12:27:00 AM -22:59
Can someone let me know what I have missed?
Cheers!!!

You probably want something like:

=Est-Actual+(Est<Actual)

--ron
.