; by (BB) the total number of days of the trip or event; and (II) the amount of any additional revenue received by the recreation service provider for an add-on activity or an optional excursion that occurred on the Federal recreational lands and waters covered by the special recreation permit. (ii) The difference between— (I) the total cost paid by the participants of the trip or event for the trip or event to the recreation service provider, including any additional revenue received by the recreation service provider for an add-on activity or an optional excursion that occurred on the Federal recreational lands and waters covered by the special recreation permit; and (II) the sum of— (aa) the amount of any revenues from goods, souvenirs, merchandise, gear, and additional food provided or sold by the recreation service provider to the participants of the applicable trip or event; (bb) the amount of any costs or revenues from services and activities provided or sold by the recreation service provider to the participants of the trip or event that occurred in a location other than the Federal recreational lands and waters covered by the special recreation permit (including costs for travel and lodging outside the Federal recreational lands and waters covered by the special recreation permit); and (cc) the amount of any revenues from any service provided by a recreation service provider for an activity on Federal recreational lands and waters that is not covered by the special recreation permit. (G) Exception Notwithstanding subparagraph (E), the Secretary may charge a recreation service provider a minimum annual fee for a special recreation permit described in section 802(13)(A)(iv). (H) Savings clauses (i) Effect Nothing in this paragraph affects any fee for— (I) a concession contract administered by the National Park Service for the provision of accommodations, facilities, or services