Cost for measuremwnt in the F18 class is not all that high. The price charged goes direct to the Association, not the measurer.
The price is used to cover the cost of measurement decals, certificate and any other expenses. The measure can and will ask for you to reimburse him for any travel expenses.
As for Entry fee, the F18 Worlds are charging $400 per head for the event.
Hope this puts it in perspective.