Commodity spread refers to the price difference between the same product due to different circulation links, purchasing and sales regions, different purchasing seasons and quality. Which of the following does not belong to the commodity spread? ['The same book has a different value when it is first published than two years later.', 'One pound of radish in the morning market, and fifty cents in the afternoon.', 'Fukang sedan differs in value from Volkswagen.', 'Salt inland A is cheaper than land B because of land inland A.']