If it takes 155 people to make a cup of coffee, assuming it's $3 and minimum wage is $7.25, then on average every person involved has to have spent less than 10 seconds on their individual contribution to have been fairly compensated (if $7.25/hr can even be considered fair compensation).

Of course, it's not like anyone involved is specifically dedicating 10 seconds to this one cup, no they're making batches. But even still, ten seconds is so very short.

Of course, we already knew almost everyone in the chain is being exploited.