600 for two, on the other hand, I find totally exaggerated. For us, food + standard hygiene etc. (toilet paper, deodorant, shower stuff, etc.) for 2 people was enough with 50 euros per week. We also buy food in a way that we can eat everything and don't throw anything away. If you prepare/cook yourself, it's not expensive at all (a small bag of potatoes for a few euros is enough for a lot of meals as a side dish)...