Piercing the ears was expensive even back then
I guess the movie took place in the 1970's or 1980's. When Vada and her friend are walking down the street past the ear piercing place, there is a sign in the window that says "Ear piercings, five dollars, earrings included." Wow. Today, you can go to Wal-Mart and get your ears pierced for free, as long as you buy the earrings which you can get for around ten dollars. My point being- that perhaps back then the price should have been a little cheaper since that was about thirty years ago.
"Munchkin doesn't like being pushed!" HP