Over on Twitter, some friends are discussing an Amazon page I didn’t know existed. You can find out how much you’ve spent at Amazon on the Order History Reports page.
I’m not sure I really want to do this, but if you want to see how much Amazon has cost you over the years, or in a given year, feel free.
It’s worth noting that you may not be able to generate a report for your entire purchase history, and you may need to do it a few years at a time.