X Number of Guests Included – Defines how many guests are included in the base cost of a per person rate. Does not differentiate between adults/children/infants. First x Guests – This would be the base rate the included number of guests (Per person Rate) or for the rate (Flat Rate). Extra Adult – The amount you will charge for additional adults . Children – The amount you charge per additional child. Infants – The amount you charge per additional infant.