I Need Sum column when grouping by field

[mamool]

Hi
i want exactly this sample in this post :
Need: Sum column when grouping by field

rob said :
" Im not sure that we can handle the sum logic for multiple group split bys.
What I have been able to do is :
If there is no split by selected for the sum options, and the list is grouped then the sum is correct for the current grouped data set.
Heres a screen shot of a test list I made - its grouped on teh category field .... "

how to Sum column when grouping by field with calc Eelement ?
please help me

 

[mamool]

i unable to insert link in my post
in post "Need: Sum column when grouping by field" rob insert a screen shot
how to create form like this screen shot ?

 

[cheesegrits]

Summing with calc fields can be problematic, as calc fields are often only calculated during rendering, the value may not exist when the list query and grouping is being done.

-- hugh