Tehuacan is in Mexico at Puebla state
The report writer is a good tool for reports, only than you may be unfamiliar with it.
To sum a field, double click on your control,
expression: nAmount
format: 9,999,999,999.9999
Then click on button Calculations, then click on option Sum, click OK, click OK
and ready to go!
Be fast like the Fox
Be free like the Penguin
Se Rápido como el Zorro
Se libre como el Pingüino