Logic Implementation

Hi All,

I have a cube having Doc No, Clearing Doc No, Doc type and amount with some other fields. Suppose my sample data is as given below:

Requirement is that in Bex I have to select sum of amount as:

Capture Claering Doc No in front of Doc No. Lets say for first record for Doc No 110318, Clearing Doc No is 110330.

Now search in Doc No for 110330 for Doc type DH. Sum of this filtered records' amount will be the result of column in Bex.

Now, please suggest how and where (Bex or BI )to achieve this.

Regards,

Iira