A script to know the sum of your google play expenses
Go to https://play.google.com/store/account/orderhistory Make sure all transactions are visible by going to the bottom of the page Paste the script in the console and press enter
If your currency isn't the euro, just ignore the "€" sign and replace it with the appropriate currency.
I have never cancelled a payment, so I don't know how to deal with these.
I know the code is crappy, but it works, and is simple enough to see that it isn't harmful.