Hi
one way: in your source data create a helper column with this
difference and use this helper column in your pivot table

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Regards
Frank Kabel
Frankfurt, Germany

"emlouise" schrieb im Newsbeitrag
...
I have a pivot table set up in that it displays data with values
before and
after an event. I would to be able to calculate the difference
between the
two values in a separate column within the pivot table. Does anyone
know how
to do this or if this is possible? It is using Excel 97 I have tried
using a
calculated field but it does not return a sensible answer