Try the following formula:

=SUM(IF((B3:B7)-(B2:B6)0,(B3:B7)-(B2:B6),0))

You have to enter it as an array: press Press CTRL+SHIFT+ENTER when entering
the formula instead of ENTER. It will look like this if you entered it
correctly:

={ SUM(IF((B3:B7)-(B2:B6)0,(B3:B7)-(B2:B6),0))}


"Nuno" wrote:

Hi there,
I'm having a problem with someting I need to do. I need to SUM up diferences
with a criteria!! For example:
A B
1 1.544 -322 (A2-A1)
2 1.222 0 (A3-A2)
3 1.222 541 (A4-A5)
4 1.763 37 (A5-A4)
5 1.800 -563 ..........

Total needed = is the sum of positive differences 541+37 = 578
I would like to know if there is a formula which gives me this result (578)
without using the collumn B ??

Can you help me? thanks.
Brgds
Nuno