Most calculators come with a book of instructions. Unfortunately, if you misplace the book, you’re left to your own devices in figuring out how to use the calculator. Wouldn't it be easier if the calculator had a built-in “help” function similar to the one on your computer? You could just punch the “Help” key on your keypad and call up the relevant instructions on your display screen. You just invented a calculator with this feature, and you’re ready to roll it out. First, however, you have to make some pricing decisions:

Describe both your introductory and your long-term alternatives. Then explain and justify your choice of the methods that you’ll use.