Honestly I don't know the prices of grocery items
Me neither, however, some stores are nice enough to publish them on the daily basis. I know for my country that
Lidl does that (unfortunately you have to understand Romanian for that).
Milk, 1L, 3.2% : 0.82$*
Water, 6 bottles of 1,5L: 3.5$*
Cheap Water, 6 bottles of 2L: 1.76$*
Salted Cheese, 400g: 2.03$*
Eggs, medium, 10: 1.29$*
*The RON-USD conversion I've made with Google.