[Freeswitch-users] Mod_nibblebill for CDR billing

[Rogelio Perez]

 From the mod_nibblebill documentation:

At the end of a call, the module sets a variable named  
nibble_total_billed. You can use mod_cdr to record this variable to  
your CDR log.

Is it possible to do the same with mod_xml_cdr?
I'm looking for a simple way of billing my CDRs and this one looks  
like a good solution.
Has anyone tried doing anything similar?

Thanks,
Rogelio