Cobalt:
I'll bite.
1] I average about $55-$65 a week at Publix. That's supplies (paper and cleaning products and such) as well as food.
2] I fill the car maybe once a month. Use it only when going "off campus" or further than 8-10 miles in any particular trip. Electric golf cart.
3] Very hard to say. Most of my "fun" is either cruising (obviously a little more money than were I staying home). When I'm home in TV, my fun is almost always covered by a number of social club events (at the most, $20 per month/event); seldom do either square.
4] Almost always have $100 or more in my wallet, just in case.
You asked for a daily amount. That's very hard, but, based on the preceding vague answers, I, as a single, could probably be comfortable with $15 a day [that'd be about $450 a month!].
SWR