KOMK-FKWRT -----> where is the value for Net Value in Document Currency

hi ,

in standard medruck script , there is

KOMK-FKWRT ---> Net Value in Document Currency

But this "komk" seems to be structure.

i need to fetch this total net value excl.tax from which table ?

can anybody tell me.......about from which table i should pick fkwrt value.

thanks in advance,

krishna