Most Helpful Girl
Depends on the salon, but here in Finland it could easily cost over 100 euros. I definitely recommend getting it professionally done regardless of what it costs, since bleach is not something you should fool around with. Check out some of the salons near you and ask them what prices they offer. Obviously the more high quality salons tend to charge more, but you don't want to go to a cheap one either. Find a middle ground. I'd say that around 100 dollars, maybe a bit less (if you're only going to do some highlights) should be reasonable enough.