Charge Unit

Defines a chargeable resource. It can be any numeric field name. A charge unit can be:

Simple: An existing element defined within an output record definition. That is, a numeric field from the incoming record (ORD) used in the chargeback algorithm. Any numeric field in the record can be designated as a charge unit, and thus charged for.
Complex: A user-defined name that is calculated from two or more existing output record fields. Note: You can also use constants.