Have searched all available manuals, but can't find any helpful information, so please advise me, thank you!

1. How can I set up VP (victory points) for Unit? In excel file (e.g: CW 80s United States.xls) or in other place?
2. What mean "SA Value" column in Systems tab in excel (e.g: CW 80s United States.xls) - how does this number translate into combat?
3. How am I supposed to understand "Combat Ratings = 2 Area" - how does this number translate into combat?