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lizzy96 I have 0 economic classes and anything related to real life lol
You just learn it by living. You call or show up somewhere and ask for instructions, if you can't find on the internet. Yes, you might feel stupid at the beginning but most of the people will explain it to you and forget about it, they might be even happy they did a good deed. And throughout time, you'll learn
Just accept it that college isn't meant to prepare you for the real world, only for the job that you want to have (sometimes not even that, but you want that degree, don't you?)