The all stock is more like $10.00 per 50 pound bag. But again it's not great quality and she will only need a tiny bit a day. I feed my minis 1 small coffe mug per day. 1/2 in morning and 1/2 at night. The better quality feed is more like the prices you listed. And for 1 mini a goat it will last you a long time. Around the time "res" listed.
Wow. I'm starting to think this will be music to my parents ears.