How to count the total of a sum measure which matchs a condition

[rmlcavalcante]

Hi, guys. I'm new on Qlik Sense and I'm building an app at work. 

I'm making a table which contains PRODUCTS as dimension and UNITS as measure.

In PRODUCTS(dimension) I have a limitation with exact value <= 0 

So, I would like to be able to show in the totals only the number(COUNT) of PRODUCTS which finds my condition (<=o). 

How can I do that? 

Thanks in advance. 

[BrunPierre]

As below

=Count(DISTINCT {$<UNITS = {"<=0"}>} PRODUCTS)