Hello everybody,

I've found recently a very useful formula on Chip Pearson's page
(http://cpearson.com/excel/duplicat.htm) dealing with "counting unique
entries in a range". I think the best one for my special case would be the
one for "no text / no string" values, i.e.

=SUM(N(FREQUENCY(Range, Range)0))

From this point, I'm trying to elaborate a bit on this by adding two
conditions in order to get something like:

"Count unique entries in a specific (f. ex. A) column, but only if in column
B we have a value = 555 (number) and in column C we have a value = XYZ
(text)."

I would like to avoid "filter, copy and paste" solution...

Till this point, I was unable to find a correct solution by myself. At one
point I've thought about passing through SUMPRODUCT, but with no success.
Maybe one of you have already had such a problem? Do you see how to resolve
this?
Thanks a lot for any comment or hint!

Mark