hanks to tutor2u for this clip
http://www.tutor2u.net/economics/blog/productive-efficiency-how-amazon-gets-packages-to-you?utm_medium=email&utm_campaign=Daily%20tutor2u%20Economics%20updates&utm_content=Daily%20tutor2u%20Economics%20updates+CID_277a97dbe27b43afb9574747116b8029&utm_source=CampMonitor&utm_term=Blog%20%20Productive%20Efficiency%20How%20Amazon%20gets%20packages%20to%20you
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