Hi

Try entering in C1
=SUMPRODUCT(--($A$1:A145),--($B$1:B1<100))
Copy down column C as far as required.

Regards

Roger Govier


gpoky wrote:
I need a runing total of how often conditions in two ciolumns are met. for
example, how often is column A 45 and column B < 100 in my data?