I was just thinking of asking this question. Outside of writing, I am a business owner, and I know Amazon is a very large company with some smart people operating the company. I have to ask the question. Why are these reports so limited? Why can we not see total sales? As well as graphs? or other reports?
Some ebook sites (like Kobo) do give you lifetime total sales. Others, like Amazon and B&N, don't.
I think for the two that started as booksellers long before they became ebook sellers (Amz and B&N), they just used the model that traditional publishers use--how many books were sold this month, how much do I owe you.
It's actually kind of fun adding up one's sales. You can make your own spreadsheet and manipulate it however you like.
I'm guessing that means we have to do our own conversions, too, huh? I just downloaded my July Report (my first one, yay!) and I was bummed to see that Canada's and UK's sales were listed in their currency. I thought it would be converted so I could get an understanding of the total.
Does that mean that when I get paid those royalties, I'll be getting 3 separate payments - one from US, one from Canada, and one from the UK?
It might be helpful for you to reread "Section 5.4 Royalties and Payments" of the KDP Terms and Conditions (the contract that we agree to when we publish on KDP). Section 5.4 has all the details about how and when you get paid.