How to convert the Null values into zero's in webi.

Hi All,

I am facing one problem , i have two dimensions like Name and Salary. But in salary object some rows has null values . while creating the webi report , the report look like.

Name      Salary

XYX        5000

ABC             

FCD        4500

AZX         

GHI         4000

but  i need ZERO(0) instead of null values .

Can any one help me.

Thanks for advance.....

Arjun