How can i get the number of items in a smartlist?

Summary

How can i get the number of items in a smartlist?

Content

Hi i am trying to make a business rule using values stored in smart lists. I am using Hyperion Planning 11.1.2.4.

So, what i would like to do, is to divide a stored value in the smartlist to the total of the smart list values, i'll put an example:

SmartList Test:

Values:

1 - Value1

2 - Value2 (this value is selected and stored on database)

3 - Value3

4 - Value4

I would to make a business rule to divide: Value2 / Value4 ( or in stored values : 2/4 ).

Thanks for the help!