Yeah i think you need to look into things a little, for the Wife, 3yo son and myself we might spend about $100 a week at a supermarket, and then every second week or so will goto a bulk meat butcher and get about $100 worth of meat, I buy whole rump steaks for about $9/kg or scotch fillet for about $12, then 20 chicken breasts at between 6 - 8/kg.
We figure if we are going to eat we are going to eat well so always make sure our food both fruit, veg and meat is good quality.