The cost of goods sold is adjusted to include the tax to be paid if all the corporations have to pay the same amount of tax.  

Albertson's/Safeway will pass the tax on and so will Wal Mart etc.

Chevron, ARCO, Wal-Mart,  Shell, Safeway, will all pass the new tax on just like they do with the current Federal, State and Local gas taxes.   Why would they not?

"Price sensitivity" doesn't stop all those gasoline stations from passing it on to the consumers.  

"The Oregon excise tax on gasoline is 30.00¢ per gallon, higher then 72% of the other 50 states."  

Eugene's gas tax and Springfield's gas tax is added in and the 18.4 cents of Federal gas tax as well.

50 cents per gallon at the pump is just taxes.  When you throw in the money the Democrats want to add for 'carbon credits' it will even get uglier.