Isn't this interesting?

Estimated Price Breakdown Per Gallon of Gasoline
As of September 5, 2011	Branded	Unbranded
Distribution Costs, Marketing Costs and Profits	$0.16	$0.06
Crude Oils Costs	$2.66	same
Refinery Costs and Profits	$0.48	$0.57
State Underground Storage Tank Fee	$0.02	same
State and Local Sales Tax	$0.09	same
State Excise Tax	$0.36	same
Federal Excise Tax	$0.18	same
Retail Price	$3.95	$3.94
Source of Data

I realize the data is coming from California, but why is there so much difference in Distribution Costs between branded and unbranded gasoline? 

The difference in Refinery Costs does not make that much sense either. 

Do all States have a Storage Tank Fee?

Are crude oil prices based upon the current highest price of crude oil or some weighted average of crude oil purchased from a variety of sources?

I guess this is nothing really THAT important, but we were just wondering?