The total cost of the trip will completely depend on whether you wil be staying in the refuges or camping. Refuges cost more, however they do include breakfast, dinner, a hot shower and a place to wash dirty clothes. Whilst camping costs less you will have to buy your own food which can be expensive if not bought in a supermarket. As I camped during the entire trip I cannot give an acurate calculation of how much staying in the refuges wil cost. But given the guide of approximately 50 euros per night x 11 nights = 550 euros. 

 

Here is a breakdown of what I spent during my the time on the TMB;