Cooked up my mix (7th Gen, sod. Metasilicate, oxyclean). I ended up with 13.3 lbs. Which came to about 3.50 per lb. I didn't use up all the oxy clean or 7th Gen. so really a bit cheaper. And as much as I like my local co-op, the 7th Gen. was way more than it should have been.
I bet it...