About $14 for Purina Layena 50 lbs at the feed store, for the co-op store brand it's $11.50 and the girls like it better!
Just got a 90 lbs bag of mixed cracked grains straight from a friend's local mill for $12 - I cook those in large pots once a week and store in the fridge, so the girls get a breakfast of protein-rich, warm mash every morning (I add boiling water, some turkey grower crumbles, raw ground meat, grated veggies and fruits, flax seed and any leftovers from dinner...).
Everyone's feathers are thick and glossy and I get eggs galore!