Summation of line item values in CKF

Hi Gurus,

I am getting line items & their values in cube. But I need to show the header value i.e. the totals of line items in Bex. for the header value column, I need to show 7000. How can I achieve this in Bex?

Document Item itemvalue headervalue

1 10 2000

20 3000

30 4000

Rgds,

Priya.