And here is an article in Forbes from a guy who worked for McDonalds for 30 years including 13 years as the President of McDonalds.
https://www.forbes.com/sites/realspi.../#7b6b139f3edd
From that article:
"Let's do the math: A typical franchisee sells about $2.6 million worth of burgers, fries, shakes and Happy Meals each year, leaving them with $156,000 in profit. If that franchisee has 15 part-time employees on staff earning minimum wage, a $15 hourly pay requirement eats up three-quarters of their profitability. (In reality, the costs will be much higher, as the company will have to fund raises further up the pay scale.) For some locations, a $15 minimum wage wipes out their entire profit."
"Recouping those costs isn't as simple as raising prices. If it were easy to add big price increases to a meal, it would have already been done without a wage hike to trigger it. In the real world, our industry customers are notoriously sensitive to price increases. (If you're a McDonald's regular, there's a reason you gravitate towards an extra-value meal or the dollar menu.) Instead, franchisees can absorb the cost with a change that customers don't mind: The substitution of a self-service computer kiosk for a a full-service employee."