This is my experience too. I don't know where the CPI ever gets its data. But Inflation is clearly over 100% for restaurants in California. Literally in the last 3 years.
b) There's no way that inflation is "over 100%" in restaurants in California. For example, a carnitas Chipotle burrito is currently $10. In 2018, five years ago, I ordered the same thing for $8 (I have all the records of my purchases). That is only 4.5% annual inflation over that time period (25% total). I don't feel like checking other restaurants, but I suspect if you actually look at data and not your intuition it will agree with this.