i write this formula:

whileprintingrecords;
global numbervar V34XS;
V34XS := Sum ({@34XS2Bakiye}, {SSiparisDMatrix.Nitelik1})

this fields convert to number :

ToNumber({@V34XS})

then i want to sum :

sum({@number34XS})

but i get the following error :

This fields cannot be summarized

How do i?

Thanks,

Thanks, i use your formula, it was sum fields, But it is not independent from the database. it sum database records. but I want to make  records collection in group footer. for example number of group footer 13 , 0 ,0 ,1. I want to just this number collect on report footer. But this formula makes 28 as result.

Thanks,