Trip charge is what we charge to come to your location and preform the service you require. As the map depicts anywhere inside the first circle is $25.00, second circle is $50.00 and third circle is $75.00. An example of what it would cost for us to come and unlock your car if you were parked in the Highway 49 Walmart parking lot would be $15.00 for the trip charge plus $25.00 to unlock your vehicle for a total cost of $40.00.