Hi,

I am trying to get a spread sheet to do the following...

I get data like Room 23, 4-july-2005 to 6-july-2005 9-july-2005 to
12-july-2005

What i need to do is find the days its empty to organise cleaners.

If binaries are allowed let me know, might make it easier to understand.
I can send what i have, but the formula eludes me,


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Thanks,
Mark.