I want to calculate the number of working hours between two dates.

As an example: I receive a fault call and log the date and time. I also
record the date and time when it is resolved. I then need to calculate the
number of hours it took to resolve the call taking into account the fact that
I only work Monday - Friday & 9am to 5pm. I can calculate the hours between
the two points easily enough but can't find a way to account for the
non-working hours over night and the weekends.

I am using Excel 2000 & XP.

Any help/ideas gratefully received.

Thanks.