creating a cube based on three primary keys

Greetings,
I want to make a cube for analysis on a table that has four values

Fund_code <-- three-digit code (Primary Key)
Dept_code <--six digit code(Primary Key)
Acct_code <--six digit code(Primary Key)
BDGT_amt <--Dollar figure

I just learned about making cubes in BI using the Data source wizard, so now I want to take it to the next level.
These codes are interdependent.
meaning there's a one-to-many relationship between all three codes towards each other.

I want to make a Saiku analysis platform against this table.
I want to be able to group by Fund, Dept, Acct, Fund/Dept, Fund/Acct, and Dept/Acct

I am looking for a way to do this.
Any suggestions?
Thanks