at harvest season, direct from the farmers, and they will be $10 a bushel, on average. You'll have to winnow them, they'll be dusty. A bushel is 55 lbs. Do the math. You'll need to eat about 3 lbs per day per adult, if you're just laying around, cause grain and legumes average only 600 calories per lb. include some local honey, some salt, Crisco, and powdered milk. Not more than $2 a day per adult. Need at least 6 month's worth and also need some non-hybrid seeds and knowledge about sprouting.