Printing the totals of 1 column under another column

Hi all,

I have an internal table with 3 fields A, B, C .

I want to print the subtotal of the column 'C' under the column 'A'.

eg:

Material_Group Matnr Cost

-

-

-

MG1 M1 C1

MG1 M2 C2

-

• (C1 + C2)

-

(This should come under the column "Material_Group" instead of the column "Cost" )

Hope that the requirement is clear. Please help me out in this ..

Thanking you in advance,

Shankara Narayanan T.V