Here's an interesting comparison of what families in different countries eat in one week and the associated costs.
Germany: The Melander family of Bargteheide
Food expenditure for one week: 375.39 Euros or $500.07

United States: The Revis family of North Carolina (Sure hope most American
families eat more fresh fruits and vegetables and less junk food than this family.)
Food expenditure for one week $341.98

Mexico: The Casales family of Cuernavaca
Food expenditure for one week: 1,862.78 Mexican Pesos or $189.09

Egypt: The Ahmed family of Cairo
Food expenditure for one week: 387.85 Egyptian Pounds or $68.53

Ecuador: The Ayme family of Tingo
Food expenditure for one week: $31.55

Bhutan: The Namgay family of Shingkhey Village
Food expenditure for one week: 224.93 ngultrum or $5.03

Chad: The Aboubakar family of Breidjing Camp
Food expenditure for one week: 685 CFA Francs or $1.23