This is a trip cancellation insurance policy made up of two components.
The first component is for trip cancellation. If you are NOT interested in insuring your trip cost, but only want the second component of “post departure” benefits (listed above), you can enter $500 for the trip cost (it is the same price as if you listed $0.00). By doing this you have $500 you can claim if you have to cancel your trip due to an eligible reason.
The second component is for trip interruption. By using $500 trip cost, you create a $750 trip interruption benefit. This is currently being used when you happened to be quarantined and detained. Your return ticket should still have its value, but if you incur additional travel expenses, you can file a claim using the $750 trip interruption benefit.