Maybe I should have looked at the agreement more closely but I exceeded my 400 free kilometers by 229 on returning the car to Broome WA the agreement said 0.25c a kilometer, just to let others know the reason for the bill of $72.54 instead of $62.97 ( The charges which are added are: 3.5% admin recovery fee, 10% premium location surcharge (airport fee), 1.36% credit card fee and 10% GST. )
So these charges are not only added to your normal charges but the excess K`s as well so be careful if you exceed any Kilometer charges.