Average prices of some basic foods in shops are the following:
1 kg of bread 2,00 EUR
1 litre of milk 0,75 EUR
½ litre of beer  0,95 EUR
daily paper 1,00 EUR

Average prices of some basic foods in restaurants are the following:
1,00 EUR for a cup of espresso coffee,
1,40 EUR for 2 dl of cola, 
7,00 EUR for a classical, large pizza, 
7,00 EUR for a portion of pasta with Bolognese sauce.

In tourist spots you can expect slightly higher prices, while outside the tourist spots the prices will be lower than the average.