Printing script

[rezdragon]

Ok here is a little something im comused about ive got a invoice file that im working on. The customer wants to be able to print in 3 different formats. Some customers get billed weekly some get billed monthly and some don't get billed cause they payed up front.

So ive got the print file sorting according to if they are weekly or monthly no problem.

now im just haveing a problem scripting that if they have a ze3ro balance not to bill them at all.

any ideas?