Hello , I'm interested in purchasing this book. I have a few questions? 1. If I purchase from your company, does this book have an ISBN number and all the legal requirements to resale in the U.S.? 2. What is the minimun order quantity ? 3. What is the unit cost at the minimum order quantity ? 4. What is the maximum quantity I would have to purchase to get the lowest price and what is the unit cost at that price? Thank you, any help would be great and if things look well then I would like to place an order. Very Respecfully, David Edwards Owner/OperatorTAG Show More