I HAVE RESIZED ALL OF THE PICTURES TO MAKE IT EASIER TO VIEW. Here are some formulas that I used when I was teaching and building my Dart. I thought some of you might be interested. Feel free to copy, print, paste, or whatever. They are mine and don't have a copyright etc. invloved. They can be "copied" and "pasted' to a word processor program and they come out on one page each. If you word like me to e-mail you the files I have in my computer just let me know.