With JavaScript calculation engine the code with WHEN/ENDWHEN will be:
*XDIM_MEMBERSET F_ACCOUNT=R_08,R_09
*WHEN ACCOUNT
*IS R_08
*REC(EXPRESSION=([F_ACCOUNT].[R_06]==0 && [F_ACCOUNT].[ZTX_IN_GR]==2) ? [F_ACCOUNT].[R_08]*[F_ACCOUNT].[ZETX_NR_G] : 0,F_ACCOUNT=R_10)
*REC(EXPRESSION=([F_ACCOUNT].[R_06]==0 && [F_ACCOUNT].[ZTX_IN_GR]==1) ? ([F_ACCOUNT].[R_08]*[F_ACCOUNT].[ZETX_NR_G])/(1+[F_ACCOUNT].[ZETX_NR_G]) : 0,F_ACCOUNT=R_10)
*IS R_09
*REC(EXPRESSION=([F_ACCOUNT].[R_06]==0 && [F_ACCOUNT].[ZTX_IN_GR]==2) ? [F_ACCOUNT].[R_09]*[F_ACCOUNT].[ZETX_R_G] : 0,F_ACCOUNT=R_10)
*REC(EXPRESSION=([F_ACCOUNT].[R_06]==0 && [F_ACCOUNT].[ZTX_IN_GR]==1) ? ([F_ACCOUNT].[R_09]*[F_ACCOUNT].[ZETX_R_G])/(1+[F_ACCOUNT].[ZETX_R_G]) : 0,F_ACCOUNT=R_10)
*ENDWHEN
If you use ABAP calculation engine you have to upgrade to 810 SP09 for support of "&&" inside condition. Look on this note: http://service.sap.com/sap/support/notes/2228643
Vadim