.

                                      $
                      ­         $    100    $
                            1       mil         1
                          0         lion          0
                         0            $               0
                        m            1               m
                        i               0                 i
                       l                0                  l
                        l  ­         m i  l               l
                         i          l        i            i
                          o   ­      o     n          o
                             n         $            n
                                   $    1      $
                                         0
                                         0