Here's your answer off their website:
Additional Charges
Prices are based on the minimum hour requirements to complete the training, in the lowest priced resource. It is not guaranteed you will complete your training in the minimum hours. Should you exceed any flight/ground hours, you will be responsible for the additional costs. Please plan and budget for any additional costs that may occur. Higher rates for aircraft upgrades may apply. Prices are subject to change without notice
Fuel surcharges may apply.
That's what you signed up for, buddy - an open-ended fee.