Sub total in alv grid

Hi All,

I need subtotals against to matnr and matkl.I have 5 fields in my table matnr maktx matkl quant1 quant2.I want to show subtotals against MATKL as well as for the materials?what exactly we have to do? any thing we have to take of position of the fields in the table?since I am getting subtot against only Matnr not with Matkl this is the problem and also I want to see only subtotals in the report output.

Thanks&Regards

Mahesh