It's 2:00 AM and I'm not going to have the time for this thread.
George Little, This site's book store has all the information you need regarding Volts and computer compatability.
For all you others, Volts is offered with a 10-day free trial. Its Help file contains voltage drop and many other formulae and examples of use. Download links and program requirements and information are also available from ECN's book store.
Sorry, but with my new schedule, this is the best I can do.