Changes

"Percent of Balance Due" - will use the 'Balance Due' in the Charges & Payments tab of the booking.

"Percent of Charges" - will use the 'Total Charges' in the Charges & Payments tab of the booking

"Percent of Price" - will use the value in the 'Price' field in the Charges & Payments tab of the booking.

"One Night of Charges" - will use the average price of a night calculated from the sum over all nights.