Man food in the Bay Area is cheap.
It's not the cheapest, but it's my go to example of how "cost of living" really doesn't multiply all your costs by the same amount. The Bay Area is primarily expensive for housing and also for services (because those workers need to buy housing). Commodities like food and consumer goods really aren't more expensive in general.
The Bay Area is also relatively close to where a lot of produce is grown. Transportation costs matter.
I live in So Cal, near where it's grown too. I have found that most produce is cheaper "back home" in western PA or upstate NY.
It's fresher here, but cheaper there because of overhead. Minimum wage is higher, rent on the space is higher.
One of our newspaper writers wrote an article several years ago. It was prime strawberry season, one of our two biggest crops. He went to visit family in Atlanta, saw strawberries at the store labeled "Santa Maria Strawberries" and they were cheaper than they were here, ever.
What the Bay Area has going for it is competition. Large area, more stores would be my guess. We don't have a Walmart here, but we did get a 99c store and we have some Mexican stores. These places are in low-rent districts with crappy parking.
On the photo of food: it's off by about $10 I'd say. Meat mostly is more expensive. Milk off by about $1. Instead of $20 it would be $30-32.