Drilldown vs Structure Element issue

Question

Dear Gurus,
I have 2 free chars and several structure elements in my query along with 3 KFs. My req is like this.
KFs - KF1 KF2
Struc Elements - S1 S2 S3 whereas say S3 is nothing but a formula S1+S2.
Free Chars - FC1 FC2
Data in Cube:
FC1    FC2     KF1      KF2
A1       B1        1           1
A1       B2        1           1
A1       B3        1           1
A2       B4        1           1
A2       B5        1           1
A2       B6        1           1
When I execute te query its all fine. My report looks stg like this..
S1      3         3............condition FC1 = A1
S2      3         3............condition FC1 = A2
S3      6         6
When I drill down on FC1 and FC2, I see this...
S1      A1    B1    1      1
S1      A1    B2    1      1
S1      A1    B3    1      1
Result                 3      3
S2      A2    B4    1      1
S2      A2    B5    1      1
S2      A2    B6    1      1
Result                 3      3
S3      A1    B1    1      1
S3      A1    B2    1      1
S3      A1    B3    1      1
S3      A2    B4    1      1
S3      A2    B5    1      1
S3      A2    B6    1      1
Result                 6      6
Basically, we do not want to see the breakdown on S3 when we drilldown on the free characteristics...Any ideas how to do this ?

Answer 1

Thanks Rakesh, but thats not what I am looking for. May be I did not put the question right. I want to see the report as below when I drilldown on my free chars.
S1 A1 B1 1 1
S1 A1 B2 1 1
S1 A1 B3 1 1
Result 3 3
S2 A2 B4 1 1
S2 A2 B5 1 1
S2 A2 B6 1 1
Result 3 3
S3  -    -  6 6