How much you spent on LoL RP?

I spent waaay too much. I bought the last 20? i think champions released with rp and have all of the legendary and ultimate skins. I also gift a lot. Last time i did the math was late last year and it was in the high thousands $. I don't really regret it (ok maybe a bit when looking at the whole cost) since i enjoy the game and it has brought plenty of fun moments with my friends.