To add cancellation cost
1. In Reservation view in the table in top right corner, press 'Cancellation'.
2. You will see a list of all cancelled contracts, check the ones you want to add a cancellation cost for.
Press 'Save'.
3. This will add the corresponding cancellation cost to the reservation.
To remove cancellation cost
In similar way you can remove a cancellation cost like this:
1. In Reservation view in the table in top right corner, press 'Cancellation'.
2. You will see a list of all cancelled contracts, uncheck the cancellation costs you want to remove.
Press 'Save'.
3. The cancellation cost will corresponded to the remaining checked contracts.