How does money work?

Optional listening practice (facultatif)

http://www.youtube.com/watch?v=ovRaOfllGgw



http://www.youtube.com/watch?v=GTit6vNx75w&feature=related

http://www.youtube.com/watch?v=w5FyApwObiY&feature=related



http://www.youtube.com/watch?v=UdMwTLbboBQ&NR=1



http://www.youtube.com/watch?v=OEB3HRwP6t0&NR=1



http://www.youtube.com/watch?v=e8fUtwshNaY



http://www.youtube.com/watch?v=FdQVGXmd-08&feature=related



http://www.youtube.com/watch?v=TVBSE1VkMK8&feature=related



http://www.youtube.com/watch?v=qSI_nN0DvWA&feature=related



http://www.youtube.com/watch?v=aCzGeLnD410