He researched and figured out a demand curve for cocoa (or whatever is used to make chocolate) and then somehow teamed up with somebody who had worked out a supply curve for cocoa/whatever it is. (I may have those reversed but you get the idea).

Anyhow, he made a lot of money for Mars/M & M because their supply and demand curve made it so they could predict future prices of Cocoa/whatever so Mars knew when to buy and sell futures so they could minimize the most important ingredient in most of their products.

He came and spoke to us when we started business school at BYU. It was a long time ago but that's what I remember.