Some other angles to consider:
First, California is huge, 164,000 square miles or so. There is quite a variety in the cost of living in different parts of the state.
Second, some things in California are cheaper than other places. My food costs and heating and air conditioning costs are quite a bit lower than other places I have lived. My taxes (state income, property, car and sales) are mid to high. All those things need to be considered when looking at the financials of moving.