English teachers might be picky about punctuation, but it never cost a student 2.13-million dollars for a misplaced comma. One company was able to get out of a contract due to one pesky little extra comma that changed the implication of the terms of the contract.
Basically, the additional comma changed the meaning of the sentence that instead of locking the contract for five years, after which it could be cancelled with a one year notice, to saying that the contract could be terminated at any time with a one-year notice. A bit of an error on the part of someone's lawyer.
I just wanted to reiterate the importance of using punctuation properly. While it might not cost you 2.13 million for a mistake, using it correctly will save on potential embarrassment and misunderstanding. Let us recall the Shakespeare passage from a previous post where punctuation made all the difference (and knowing about punctuation makes the passage hilarious).
At least in the legal world punctuation is taken seriously.