How to calculate subtol and total values in alv.

Hi expert,

I want to calculate the subtol and total values in alv as follows,

example:

month: Jan Fer Mar Apr

-50 -30 40 -10

-20 -13 -12 -10

subtotal -70 -43 28 -20

-10 -10 -10 -10

-10 -31 -15 -10

subtotal -20 -41 -25 -20

total -90 -84 3 -40

when i put '-' in front of the month,i define the month type c,

and when the type is c,it cann't calculate the subtotals and totals.

how can i do can make the layout like the example.

thanks...

Edited by: Heum Kim on Aug 25, 2008 3:54 AM