Professional Selling Plan – is it per country or per region?

Hello everyone, I’ve tried googling this and going in circles with the seller support (as we all know how efficient and clear they are in answering to queries). But I’m a little confused.

The professional selling plan, is it country wise or region wise?

The $39.99 plan, is it just for US? Or North America region? And if I want to sell just in US and Canada, do I have to pay $39.99 twice or just once?

Appreciate any help. Thank you!