I'm wondering if it's possible to perform a specific calculation within
a pivot table. Here's the summary:

I have a query that returns numeric values in columns called "A," "B,"
and "C" for each user in a list. The Grand Total column is the sum of
A, B, and C for each user. I'm interested in showing the percentage of
a user's values belonging to C (e.g. C / SUM(A+B+C)).

Is it possible to do this without introducing any sort of additional
sheet or helper cells?

Thanks for any input.


jim