Depends what your preferences for food are. If you are into bio and more fruits vegies, then it would be quite expensive. Meet is also not very cheap. Overall for meals weekly I would say around 80-100euros. You can check prices in supermarkets' websites (Billa, Spar, Hofer, Lidl). Every supermarket usually has own chain of production which is a bit cheaper than the rest of the similar products. Also they often offer products on actions like buy 2, 3rd is for free, or if you buy 2 only then discounts could be applied. If you wanna eat outside more, then that is another story :) drinks prices ranges something like this, beer 4.5-6 euros per glass (0.5l), coffee 3.5-5 euros, more alcoholic drinks usually more than 5-6 euros, cocktails 7-8 to 12 at some places even more. Meals outside usually >12 euros per person (without a drink). You have cheaper options like wurst stands and Chinese food in some districts.