Gst on hotels room and food

 please help me Our Core business is 1.Resort 2.Hotel Providing Services of  renting  Accommodation, Serve food in Restaurant , Food served in Room at extra charge, laundry, Spa ,Car service etc  

1.     Sale  ex. Sale room at 6000+GSt 18% including only Breakfast and Lunch Dinner Not includes  

1.1. )Guest Takes a Dinner in the ROOM which is not includes in above rate , and we are making separate billing called “Room Service (Served only Food)“ , How much  GST to be charge.  

  1.2) Minibar Freeze kept in room Also same guest consume Minibar Items (Wafer, Chocolate,Areted water ) Which kept in minibar freeze . We charge separate and making invoice separate   How much GST to be charge.    

1.3) Same Guest consume food in restarant which is not includes in above rate , it charge seprate and making invoice seprate 

  1.4) All above invoice and other service bill which has GST charge  of 18% and all bill will be post in to Guest room and print final room bill  to collect payment, is it makes a GST complications in future.