Curtis,

An array formula would work here. Could you please give a little bit more
detail about your data? You mention days. Does this mean the month is to be
calculated from a date?

Thanks,
Matt

"Curtis" wrote:

I need to calculate the sum of number dependate on 2 conditions. One
condition is emplyee number ( in a column of many numbers) and the other is
the month (in a column listed with many days)