Average issue in analytical view

Hi,

I have a small requirement to calculate average based on region.

Whatever I am trying to do,first I am calculating SUM and then trying to put in calculated column say Sum(Salary) ( datatype i).

After that will do COUNT and again put in calculated column say Count(Salary)( datatype i ).

Now when I am trying to divide Sum(Salary)/Count(Salary) , its not working but when I am dividing Sum(salary) / 2 ( or say any number ) it works.

Can someone help? Am I going with wrong approach?

Table1

Region          Salary

A                    1000

A                    2000

B                    4000

B                    5000

Output:

Region          Salary

A                    1500

B                     4500

BR

Sumeet