The folder "Formulas" contains the mini formulas 
that make up the big program, So you can use each as a separate program
if you want. In the app the main menu and end both go back to the beginning
screen. In the separate programs the main menu and end both end the program.

Formulas.hex is the file i created using BasicBuilder, which
i downloaded from the ti website.

the Formulas.hex files is converted into the app using
Wappsign which was also downloaded from the ti website

Enjoy and read the readme file for program info, including the actual
formulas
