Order Surcharge
Sets the price of a service to a percentage of all services with a lower priority. This way, its possible to add a 3% credit card charge for example.
The priority of a product can be set via the 'calculation priority' field in the edit product screen. This is totally independend from the product tree configuration!
Optional properties:
IncludeVat (bool; default=true)
if true, the VAT is included in the calculated total. If false, the calculated total will be excluding VAT.
See also
how to configure order surcharges