I forgot the URL of the page that I can access it with, it's something like store.SonyPlayStationnetwork.com. On the page, at my name on the right there is a drop-down menu carrot next to it and when I click there is Purchase History, I think it's the third subcategory.
Solved! Go to Solution.
Not sure on PC, but you can see it on your PS3 by logging in to PSN>Account Management>Transaction History.
60GB Fat OFW 4.50
250GB SuperSlim OFW 4.50