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A company wants to decide the best means of transporting their goods. They have between air, sea, road and rail. Each option has a fixed rate

Air = $100 per 7 tons

Sea = $75 per 6 tons

Road = $120 per 9 tons

Rail = $110 per 8 tons

Write a c++ program that asks for the weight of the goods to be transported in tons and determines the cheapest way to transport the goods. Your program should also output the difference in price between the cheapest and the most expensive transport.