I were you I would go back to the site and do a dummy booking - i.e. not finalize it, but scrutinize the site to see if there is any mentioning of the agency cancellation fee.

EDIT:

Here is what mia has found, on another thread related to TYP booking (thru Spirit).

http://www.flyertalk.com/forum/18918429-post99.html

In any event, here is the policy as a starting point:

Quote:
Airline tickets are NON-REFUNDABLE and NON-CHANGEABLE unless permitted by the terms of the fare and are subject to airline rules, penalties and fare difference. A $35.00 per ticket service fee for domestic flights and $50.00 per ticket service fee for international flights will be collected by CLTS for all exchanges, modifications, or cancellations, in addition to airline penalties and fare difference.