I don't know where you live where a healthy grocery bill is less than $10 per day per person _including_ eating out occasionally. This is with very few organic ingredients (basically I only buy organic if it costs roughly the same). Organic bill would be at least 50% more.
Where I live it costs about 40-60, depending on the restaurant, to eat out once, and a single trip to a grocery store is rarely less than $100 (and that's not enough for a week).
I said excluding eating out, that drives up food bills dramatically. I also avoid organic, but the reasons would be off topic.
I tend to classify eating out in the entertainment budget, so eating out once will mean not going to a movie. I did this when I noticed I was spending 500/month for lunch at work. Having to make the conscious decision to sacrifice a fun activity helps to put this in perspective.
Where I live it costs about 40-60, depending on the restaurant, to eat out once, and a single trip to a grocery store is rarely less than $100 (and that's not enough for a week).