Also from Hungary, Budapest. Yes, those are monthly numbers. At BP you can rent a nice flat of 60-80 square meters for 420-500$. A beer is 2-3$ and on average you need 3-500$ to spend on casual things. It depends heavily on your lifestyle obviously, but I find it hard to spend a lot.
That site is great! I love the detailed breakdown. I'm envious of what fresh food cost you. Strange enough, the beer and rent are comparable to my area. Utilities cost significantly more there than here. Our Internet costs a bit more but I get 50Mbps down. Clothing and apparel is similarly expensive.