Update Prod. Storage Costs (SCOST) via BAPI_PRDSRVAPS_SAVEMULTI2

Hi

In ABAP program I need to update 3 material master fields (NDPEN1, NDPEN6 and SCOST).

I use BAPI_PRDSRVAPS_SAVEMULTI2 and location independent fields NDPEN1 and NDPEN2 is working fine, but I can't find the right parameter combination needed to update the SCOST.

Any suggestions will be appreciated.