Alright, I've been neglecting my business here too long.  So far, I have made exactly one batch, from which a few samples have been sent.  I have taken the remainder of that batch, and poured it into a cleaned & dried plastic coffee can.  The large size you can get from Sam's Club.  It's not quite full.  I've taped it up, and intend to weigh it.  I'm not sure exactly how much a fluid ounce (one washload) of this mixed power actually weighs, but I intend to offer it at the BTC equal to 20 cents per ounce or actual shipping costs, whichever is greater.  This is a little more than what Gain costs per washload at my local WalMart; but 1) I think my stuff is better (although I might be biased) and 2) there is bound to be more washloads than ounces.  If it all works out okay, I'm going to start ordering my materials in more economical volumes; as well as work on a dishwasher formula.