settings -> misc -> data export.
There you can download a file with all your account information. including details of all your purchases
Viewing post in How do you view transactions on this site?
It's an HTML file, so you need to open it with a web browser.
At the beginning you have a table of contents, go to "Purchases" and there you will see all the purchases you have made, with date, amount paid and payment method.
Edit:
Open the browser you use (it should not matter which one you use). Drag the file you downloaded to the browser and that's it.
I ran it through https://html.onlineviewer.net/ and it worked for me. Thanks! I found what I needed.