I did pretty much what presionchef313 (by the way...hey 2 Greyhounds and thanks for your incouragement...may be getting back into business, check my journal!) did, you just have to sit down one time and break all your ingredients down and see what you have. Then you can use that particular item to add to the costs of other items which you had broken down too!
If you have Excel or some other spread sheet software that can read an .xls file you can click on my links on my web site and you're spread sheet software should automatically load and comeup with my files. If you'll go to my web site using the link at the bottom of this post, then go the the bbq page (click on the Cap'n Pete's Olde Tyme Southern BBQ sign) then click on November 2003 and then click on "spreadsheet" in the Nov 12th entry and other links that are spread sheets you'll see how after you get that cost that you can easily make entries and changes when costs change. My bbq sauce cost is $.0587 per ounce, hence, $7.5136 per gallon.
If you don't know how to use spread sheets you can do a search on the web for basic tutorials, as I did!
I have created a partial spreadsheet of my bbq sauce with some ingredients left out so you can get an idea of what you may like to try to do. Try this
link.
Any other queries you may have, if this helps, I'll be glad to try to answer.