FlightCostBalance 50:50 implementation

[pschuler78]

The FlightCostBalance feature 50:50 should be implemented for flights and deliveries.

[pschuler78]

How should the 50:50 rule be implemented, when pilot and co-pilot have not the same invoice rules.
E.g:

• Pilot is 30 years old with normal price conditions, and co-pilot is 18 years old with young-pilot special price?
• Pilot pays an aircraft per minute, co-pilot has a yearly flat-rate?

Implementation proposal:

• The invoice is created for the pilot and at the end, the invoice will be doubled (for co-pilot) with 50% discount each. In this case, the above examples are still a problem in general, but not a system implementation issue.