25 years old gir looking for accomodation in Lisbon/Almada

Good morning,

I am Mari Carmen, from Spain. 
I will study a Master in Lisbon as part of Erasmus Mundus program of Chemical Engineering. 
I will be there with two other students/friends from Poland and France.

I would like to know the price if we rent the apartment from 07/09/2015 till the end of December.

You can be sure that we will be so nice there, no parties and no any other things. We are already 25 and 26 years old so we are going there to study and travel around.

We will study in Caparica, at Universidade Nova de Lisboa.

We want 3 single bedrooms or 1 single + 1 double.

We can pay maximum 275 euros per person and month