Hello,
There would be 5 packages, not from a DB.
The quantity matters because say the bought package A for 1 month, it would cost 2.00.
however, if they bought package A for 3, 6 or 12 months, it would be say 1.75, 1.50 and 1.25 respectively.
As far as the third question, I would have them link to a a specified page either with anchors to point them to the right place, or a page for each product I was offering.
Make sense?
Thanks,
Matt