I wouldn't know much about cutting cocaine . . . lol.
Quick side story: If you aren't interested in my unrelated topic, skip to the smiley face. I also keep bees (my other massively time consuming hobby). In beekeeping, sometimes its necessary to feed the bees, rather than letting them feed themselves. In those cases, you can mix up a pollen patty or a pollen substitute patty (protein rich substance). I was attempting to make a protein rich substance, and I read an article about the bees use of a compound called Inositol, sold at GNC. So I stopped in to ask for some. They kept it under lock down, behind the front counter, and gave me some very weird looks when I asked for it. I didn't really understand why, until I went home and googled it. Apparently it's used as a cutting agent in cocaine, in addition to it's "brain food" qualities. Now the local GNC thinks I deal drugs. Great.

Thanks for dealing with that.
I appreciate your help rockm, and it's not that I'm trying to argue with you (by any means). I'm just trying to fully understand what I'm doing, while finding the most economical and beneficial result possible.
I guess what I was trying to say, was that if I can get a mixture of soil that includes akadama, and one that doesn't contain it, and they are roughly the same price, shouldn't I go for the one that includes it? If you could get low grade fuel for $3 a gallon, and high grade fuel for $5 a gallon, if you found a 75-25% mixture of low-grade to high-grade fuel being sold for $3 or even $3.50 a gallon, wouldn't it be worth it? I'm just thinking out loud here.