3) Set "Booking Price Import" to either import the room price only or the room price plus unpaid extras (cleaning charges, local taxes etc.)
4) Some Booking.com rate ids can accept a room price plus a single occupancy price on the same rate id. If you have this rate type and want to send the single occupancy price set "RatesBooking.com Rate Type " = "Full + Single". If you do not have this rate type or you are not sure set "RatesBooking.com Rate Type "= "Full onlyOne Price "