Grid column sum in case of collapse level 1 SDK B1

Hello Together,

i am using this code to get the sum of a column ( 5 in my Case) in a Grid ( Grid0 in my case) which works very fine.

The problem that i have is that i am using Collapse level which means i need to see the sum for every level and also the final sum but i get only the final sum.

Is there any way to get a sub-sum in every level and then the final one?

Thanks in Advance

col = (SAPbouiCOM.EditTextColumn)Grid0.Columns.Item(5);
            col.ColumnSetting.SumType = BoColumnSumType.bst_Auto;