I’ve seen how they shop. A single medium sized bag of groceries every other day. Basically what they can carry on public transportation.
I shop by the truckload and garden for the year.
I’ve got a 35 gallon sealed plastic tote in the garage full of dry beans, peppers and tomatoes. Next year I hope to triple that.
This is a good calculator for how much food you really need to have.
http://lds.about.com/library/bl/faq/blcalculator.htm
Well if you been in their homes the really don’t have much choice.
My office refrigerator is bigger than most of the ones you find in their homes.