Haircut is $7.0 for example.% K% g* d& x) \% z5 o; C
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After your hair cut, you pay the barber. If you pay barber a $10 bill, barber will return $3.0 to you and you just leave the barber $1.0 as tip. That's it.
The price you pay is taken by the shop. The barber only gets a small portion. They rely on the tips to make a living. So if you pay $12 for a harcut (which is already cheap), you should definitely pay the tips. Otherwise don't expect a nice hair cut from the same barber next time, he will spend less time on your hair as he makes less money from you.