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Amazon accused again of overcharging shoppers with Buy Box
(www.theregister.com)
This is a most excellent place for technology news and articles.
Prices are 100% influenced by cost. That soda may be $3.00 even when the syrup is $.30, but if the cost of syrup went up to $2.00, the price of soda at the restaurant would go up. It would do so not because they arbitrarily decided it, but due to the cost of the syrup eating into their margins. This concept is the reason behind the revolution that is modern logistics and the global economy.