ExcelBanter - Work around Calculated Field limitation

I have a pivottable I want to publish on the web. But the
web components does not support calculated fields.
Unfortunately, the calculated fields in my pivottable are
the heart of the report. So now I'm trying to think of a
way around it. Here's the scenario:

The data for the pivottable is like this:

Instance Name Pass Fail
123 Joe 1 0
124 John 1 0
125 Bill 0 1
126 Joe 1 0
127 Bill 1 0
128 Lucy 0 1

The pivottable pulls in the Name in the Row area and then
Sums the Pass and Fail fields in the Data area. I include
the Instance field in the range for the pivottable so
users can drill down and see those numbers. So the
pivottable looks like:

Name Pass Fail
Joe 2 0
John 1 0
Bill 1 1
Lucy 0 1

I add a calculated field that displays the percentage of
Pass for each Name:

Name Pass Fail % Pass
Joe 2 0 100%
John 1 0 100%
Bill 1 1 50%
Lucy 0 1 0%

Of course I can't do this because the web version will not
support that calculated field. Does anyone know another
way to get the result? I can't put the formula in the
database query because there are no aggregate functions
there (because each record is made unique by the Instance
field). I tried doing the formula on each record and then
using the pivottable to average those percentages, but the
results are not accurate.

Any ideas?

tod