On Tue, 24 Jun 2008 06:41:00 -0700, Stefi
wrote:

Thanks Ron again, now I understand the logic of the formula, it's not very
complicated, but really tricky.
Regards,
Stefi

It's good that you figured it out -- now you can apply that logic in other
areas.

Best wishes,


"Give a man a fish, and he'll eat for a day. Teach him to use the Internet,
and he won't bother you for months!"
--ron