by by Jean Merrill (Author) An Award-winning middle-grade book. Jean Merrill’s THE TOOTHPASTE MILLIONAIRE is a fun, fascinating, and informative kids’ book.  Wow, I learned how to make toothpaste, figure profit/loss margins, do advertising, what are stockholders and a Board of Directors, and how to get loans.  All with a fun story about a sixth-grader named Rufus…