What dog food ?

i know Canidae is the best but its so expensive like almost 40 dollars !!! im sorry but i cant spend that much money on one bag !!! any one know any dog foods that arnt over 10 dollars but dont have anything like corn starch and by products and other bad stuff i will not feed my dog ( purina / one / .. .kibble and bits .... beniful and iams i know they are the worst !