making a sum of formula result

hay Guys,
I have a report. It suppose to look like this:

Bruto vakgld aov loonbel kindby total

100 20 5 10 15 120
60 40 3 2 20 155

160 60 8 12 35 275 (general total)

first row total =(bruto+vakgld+kindby)-(aov+loonbel)
last row a total of all the colums.
i make the total column in a formula like above. The variable is @netto in the Detail section.
Now i want to calculate all the total values (120 and 155 which are in variabel @netto to mak 275 (general total).
How can i do this.

I am using CR 10.0
Rgrds,
djmd60

u can make a formula field and then put it on report footer column and add that two fields in that field .

by this way i hope you will get the desired result