Error: Cannot apply the operator to the types Function and Function

[felipecarvalho]

Hi, good people 

I think my problem is not too complex, but I don't understand what is going on ...

Look at this formula 

At the moment the last Column is giving me the expected result.  

Focus on the 2 variables that I have in the second and third lines. I "Rename" to "A" and "B" in the picture to make it easier to explain.

On the picture above, I am returning  B, and the result is Fine (type is null or a number).  If I return A the result is fine too.

But I want to return B -A. 

But I Get this error:

How can I solve this?

Thanks for all your help!

[wdx223_Daniel · Accepted solution]

[felipecarvalho]

@wdx223_Daniel 

I use your suggestion like this and it worked:

I think I still do not fully understand the "each" and (_).... and why they make it work...

Can you elaborate?

Regardless of that, I will already mark your answer as the solution. 

Thank you very much!