How to use Calculated text field

[EL]

Hi

I need some support on how to use the calculated text field.
I have 3 customs fields

A = cascading list
B = Label

C is my calculated text field and I would like to display
C = A + B (concatenation)

Thank you for your support

[Marc Jason Mutuc]

<!-- @@Formula:

issue.get("customfield_A")+issue.get("customfield_B")

-->

[David _old account_]

Note that A and B are the numerical IDs of the two custom fields (see the plugin documentation for details).