Do you have the normal Safeway or Giant stores nearby? I lived for a year spending less than $80 a month on food, about 75% being organic or at least less processed. It can be done. Just look for what is on sale. In a pinch, tuna is generally very cheap and I like it on toasted bread. I ate a lot of PB&J sammies, salmon (from the frozen aisle), tuna, apples... Variety was kept by purchasing what was on sale.