$11.99 for a 50 lb. bag. It's one that my local ag center mixes. It's in powder form as apposed to the more common crumbles and pellets. I love it because I can actually distinguish what's in it. With pellets and crumbles, it's just a brown color.
50lbs at Tractor Supply: $14 for Dumor and $16 for Purina.
50lbs at local feed store: $12.45 for Nutrena. $11.50 for Scratch.
50lbs at semi-local farm store: $11 for mash (ground on the spot as you wait), $9 for scratch. Everything grown on the farm