Cost of gas $ to Commute to L.A. 4 times per week and back?

Question

would it be cheaper to rent a place in L.A. to save gas money, or to live someplace less inexpensive and then commute?

How much money does it cost per day to commute to a major city every day like for example: the San Fernando Valley to L.A.

Answer 1

I think gov statistics have this data by districts.

http://www.bls.gov/