Cost for an arena game?

[umgrego2]

I feel like I might be posting this in the wrong section, but couldn't find one more appropriate.

In the Arena, it says that a games costs 20, but it actually costs 25.

[TheonlyrealBeef]

I tried each league just to be sure but it simply removed 20 from my electrum stash, no more, no less. Although you do get 5 electrum back from doing thumbs up/down I have no clue how the cost would become 25 (unless thumbing up/down would somehow substract electrum in some case, but...). Any more details, screenshots?

[umgrego2]

.... omg, so embarrassing. Bad math on my part - was costing 15, not 25