I copied the formula into my worksheet and changed A1:A111 to M:M and the
result is #NUM. Is this due to the fact that my invoice numbers are
alpha-numeric? Thanks.

"Bob Umlas, Excel MVP" wrote:

The formula can't produce #NUM unless the range already has a #NUM in it. Are
you sure you entered it as written?

"Nadine" wrote:

I get the #NUM result. Thanks for trying.

"Bob Umlas, Excel MVP" wrote:

=SUMPRODUCT(N(A1:A111<""))
Bob Umlas
Excel MVP

"Nadine" wrote:

I have a column that has about 111 rows to it. In each row is a formula that
will find an invoice number if it exists elsewhere. The are alpha-numeric
invoice #s.

I need to count the number of invoices found. If I use the COUNTA formula
for that column it will count those cells that have the fomula in it but no
result. I only want to count those cells that have a result from the
formula. Any ideas for using Excel 2003? Thanks.