Want to start selling our business’ products onto Amazon but have some questions that I cannot find answers to – can someone help?

So we sell custom namebadges on our own website but want to move to amazon as well but we have some questions and I am hoping someone on here has the answers 🙂

What happens when the order is placed, what do Amazon provide us with and how is that information sent? Ideally, they would send us an XML file with details of the product chosen, name, job title, fastener choice etc

Is it possible to change the price of a product depending on how many they order (e.g. if they order 1-5 name badges its £8 per name badge but if they order 50-100 its £5 per name badge)

Any help whatsoever is much appreciated :))