Evaluate the expression without using a calculator. 
Definitions:
U.S. Tariff
A tax imposed by the United States government on imports or exports of goods.
Oil
A fossil fuel that is used primarily for energy production and as a raw material in the manufacturing of plastics and other chemicals.
Domestic Quantity
The total amount of a good or service produced within a country's borders and available for consumption or sale in the domestic market.
Supplied
Refers to the amount of a good or service that producers are willing and able to sell at a given price.
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