I started from USA agriculture because it dominates import/exports, but I did a winding expansion to North American and Pacific Island and Caribbean sources and then finally much of the remainder of the world's sources (though I said "fruit" and definitely forgot about beets, which few would classify as a fruit, that is something I missed). It's a global market and you can't talk about how cheap refined sugar is without starting from the cheapest/highest-volume sources of it. (Just like you can't talk about European oil prices without starting at OPEC/Middle East and then the US Gulf Coast even if you eventually wanted to just talk about Scottish off-shore oil prices. The other forces are bigger so they have an impact on the market prices.)
