Ok so how much does a $3.99 big mac costs of labor is $20/ per hour ? 50 bucks! 100 bucks! What? YOU DO ANALYSIS YOU LAZY < deleted >.
What you can know for sure is that it will increase costs and cause disruption. You can know for sure there will be fewer employees at a higher minimum wage. This will come as a result of all of these: fewer Big Macs sold at a higher price point, fewer Franchise locations over time, and greater automation in existing restaurants.