An interesting thought let's work it out.
Breakfast:
Roughly 1/20 of a $3 cereal bag: $0.15
Piece of fruit: ~$0.5
Total: $0.65
Lunch:
Eating in the cafeteria $5-6
or
Packed Lunch
1/12 $2 bread loaf: $0.17
1/10 of $2 cheese: $0.2
1/8 of $4 deli meat: $0.5
1/8 of $2 chip/pretzel/crackers bag: $0.25
1/10 of $3 carrot bag: $0.3
Piece of fruit: ~$0.5
Total: $1.92
Dinner:
Eating out: $8-9
or
Cooking
...
...
Too many possibilities, but let's assume $3-4
Daily average low: $5.57
Daily average high: $15.65
Hmm...
I don't eat out for dinner very often, but I should definitely pack my lunch on a regular basis.