In my service I want to sell some books.
Books are made by authors from different countries.
Books should be sold to users from different countries.
As, it would be many-many books, there is no need to create each book as specific in-app purchase and as I know Apple doesn't have API for it. So, I decided to use Tiers.
As I understood, price for each Tier could be the same for each country.
I have created several in-app purchase: Tier 1 (1$), Tier 2 (2$), Tier 5 (5$).
So, books could sold by 1$, 2$ or 5$
I plan to link books to Tiers:
Book 1 - Tier 1
Book 2 - Tier 1
Book 3 - Tier 5
But, as I know net income is calculated in this way:
net income = ***** price - VAT - % apple
If user would be from Germany it would one VAT, if user would be from Greece it would be another VAT.
So, net income is not a static it depends on user's country.
But, if user makes an in-app purchase and I would receive net income from Apple, how could I determine - which Book brought me this net income?
For example,
User has bought Book 1, which has Tier 1.
User has paid 1$
net income = (1$ - 20%) - 30% = 0.56$
Apple would send me 0.56$
On my back-end I would know that user has bought Book 1, but I would not know that Apple has sent me 0.56$ for a Book 1.
Tier 1 could be used by many books - Book 1, Book 2, etc.
How to solve this issue?
