Extreme Difficulty

Extreme Difficulty is a 4th difficulty after hard.Winning in this earns you a Platinum medal.You must survive 500 grueling rounds.Round 500 hosts a Kab bloon.You can save your game up untill you beat round 500.You also receive 1000 Monkey Money for beating this.2000 during double monkey money and then 3000 during triple monkey money.The prices are through the roof on this difficulty.

350 for one dart monkey.That seems overpriced.