Accounting and cross country point redemption

Dear Woocommerce Gurus,

i have a use case where the sales team planned to introduce point redemption system. Every purchase gain points and customer can redeem the products when they have enough points. It’s a multi-national eCommerce site (Hong Kong, Korea, Singapore, US) and customer can decide which country to purchase the products and eventually the sale report can be synchronize into a master sheet.

But the finance book are divided into country based (to have visibility how much $$ gain for each country). Here the challenge, if someone bought an expensive product from US site and gain enough points to redeem a product (completely FREE) from Korea website

Doesn’t it means US make lots of sales but our Korea website is making a lost?? How should the account/book work from background to make the sales figure explainable?

We are currently brainstorming the idea and not yet kick start the point system, but in future we are planning to use woocommerce. So better to address the concern now. It’s more an Account & Taxation question rather than the tool.

Hopefully i make my question clear enough and thanks for your time and input.