Out of curiosity I just checked Detroit, MI, median income of 20k usd a year. Still about the same at $10.49. This is almost bewildering how the price is pegged

Out of curiosity I just checked Detroit, MI, median income of 20k usd a year. Still about the same at $10.49. This is almost bewildering how the price is pegged to about $10.75 the world over, no matter the price of labor or rent or beef or getting it to the world over. Margins must be all over the place.