Math between fields

I need to know how can I make calculation between fields.
For example I have
[b.f1], [b.f2]. How can I output the [b.f1] + [b.f2] where b is a block section andf1, f2 fields within that block

Hi,

This is not possible. Those operations are part of the business logic. You have to calculate this in your SQL query or with PHP.

Actually I found out that this is possible with a function that runs at the ondata event.

> Actually I found out that this is possible with a function that runs at the ondata event.

That is correct. Sorry.