"If the wage goes up by 10 percent the price goes up by two percent," said Professor Ashenfelter. "This is not a projection, this is based on the facts on the history. Historically when minimum wages go up, about 20 percent of the increase is passed through in prices. That's the way it's been for decades."
https://abc7news.com/california-new-law-fast-food-workers-wage-increase-higher-prices/14170142/