(NEWSER) – Fast-food workers want to make a "living wage" of $15 an hour. Chains say they'd have to jack up prices if that ever happened. But just how high? Turns out, not as high as you might think, at least according to a University of Kansas researcher. He found that if McDonald's immediately doubled the wages of all its workers (including the $9 million CEO), it would have to raise the price of a Big Mac 68 cents, from $3.99 to $4.67, reports the Huffington Post. Items on the Dollar Menu technically wouldn't qualify anymore, but that hike is relatively modest as well, to $1.17.