Calc Coln in Impromptu

[prince18]

Hi,
I am working on Impromptu where I need to insert calculated colns C and D from report coln A which has to be like C is sum of the values in the coln A whose values are negative and D is the sum of values in the coln A whose values are positive.

I am working on a crosstab report.

Thanks in advance,
G

 

[drlex]

O.K., so what seems to be the problem, then?

soi la, soi carré

 

[prince18]

How can I do that?
How can I get those 2colns C and D??

GK