United States: The Revis family of North Carolina. Food expenditure for one week $341.98.
Chad: the Aboubakar family of Breidjing Camp. Food expenditure for one week: 685 CFA Francs or $1.23.
Meet the The Manzo family of Sicily. Their weekly expenditure is 214.36 Euros or $260.11. Note the copious amount of bread.
See more families in the Daily Kos. (Thanks, Joyce)