The amount depends on you, but usually the gratuity is divided in the following way: 2/3 to the guide and 1/3 to the driver. However, it all depends on your wish. It's preferable to tip your guide and driver separately. The tour price doesn't include gratuities to your guide and driver. If you are happy with the tour and would like to thank your tour team, you are welcome to do that at the end of your tour. Please have some cash with you for the tips. It does not matter which currency you have.