Absolutely untrue. It's amazing how this "fact" continues to be shared even when shown to be false.
http://www.pewtrusts.org/en/research-and-analysis/fact-sheet...
SG&A is a catch all. It included things like staplers, secretaries, etc. it's not purely marketing.
http://www.pewtrusts.org/en/research-and-analysis/fact-sheet...