Everything must go...including their godawful spelling skills! ;)
Actually, I have a theory on this one. Look closely at the "IS" in the misspelled business. See how the slightly smaller portion of the S is the lower half of the letter? Usually the smaller half of the S is the top half of the letter. I'm thinking that the piece of paper that contains the "IS" is actually placed upside down on the store window, making the word misspelled and the S look weird. If they'd just turn it upside down again...everything would be all good.
Happy Friday, everyone! :)