Hi, it really does depend on how much you like to drink, and how much you eat out.
My husband and i, buy duty free Vodka and Bacardi at Dalaman, eat out every night, usually set meal, sometimes have brekkie or a lunch snack, do 3 or 4 trips, bring usual souveniers home, a small amount of other shopping, and we budget on 100 lira for both of us a day.
Cant wait till this Sept when we return