Simple buy all the clothing, there seems to be a lot. This was my last chivo to get. I learn that the best way to go about this is to collect all the spirit coins around the school, then quit to main menu and reload your game. Doing this will respawn the coins you picked up, along with restocking the vending machines. I also recommend you try to purchase most of the clothing while it's on sale to safe some coins. This is kind of a grind, but I got it in 10 hours.
2017-05-29 19:07