Hi folks, I have hopefully what will be a quick and easy question.

I have two colums (A & B) that hold two date and time values, a start and
complete time.
Jul 19 2009 08:30 Jul 19 2009 12:54

I want to be able to find out the actual time difference, for example above
would show 4:24 hours.

In some cases the start and complete dates could be a day or 2 apart,
therefore I would want the output to be displayed in hour format, for example:

Jul 17 2009 08:30 Jul 19 2009 12:54

Column C should be 52:24 hours.

Is there a way to do this.