Americans are expected to spend over $9 billion on trick or treats this year.
Sweets are the popular treat, while Hallowe'en decorations follow. Costumes will be purchased by 69%. (I saw stores starting to sell this stuff back in August!)
All this info comes from the press release of the National Retail Federation. to get you in the mood, see this little clip of a haunted Maple Sugar House catering to the leaf peepers.