LOL, the calculator wouldn't let me get area data for 1 adult, no children. It's BS.
Now, as of 2013. McDonald's employes 1,800,000 people ..... one in eight workers in the U.S. have at some time been employed by McDonald's.
http://en.wikipedia.org/wiki/McDonald%27s
I haven't heard of mass starvation of their workers. Have you?