WORKING OUT At the gym, there are 12 weight machines that Gina liked to use: 6 upper
body machines and 6 lower body machines. All 12 machines were in
one row, with 8 feet between each upper body machine and 8 feet
between each lower body machine. The upper body machines were
separated from the lower body machines by 16 feet. The lower body
machines were numbered 1 through 6, and the upper body machines
were numbered 7 through 12. Gina started at machine 6 (lower body)
and then walked to machine 7 (upper body), then to machine 5 (lower
body), then to machine 8 (upper body), and so on, alternating between
lower body and upper body. After each 3 lower body machines, she
would walk to the mat that was 20 feet past machine 1 and do some
stretches. After each 3 upper body machines, she would walk to the wall
that was 30 feet past machine 12 and do some stretching. When she
finally finished lifting and stretching (the last thing she did was upper
body stretching on the wall) how many feet had she walked in all?