You could buy
You can buy one of the following:
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Income of average person
Yearly income of average person (worldwide) for US$7,880 (COL$14,990 thousand) from source
Buy all billionaires
You can buy each US-dollar billionaire one of the following items:
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Souvenir guides to the Natural History Museum
Souvenir guide to London's Natural History Museum for £4.50 (COL$13,130)
Shopping list
You can buy all of the following:
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500 Carl Sagan's Cosmos DVDs
Inspirational and wide-appeal science series. Thirteen episodes, each one hour long. for £11.71 (COL$34,170) from source