Use the following to answer question: 
-(Table: The Production Possibilities for Tractors and Crude Oil) Use Table: The Production Possibilities for Tractors and Crude Oil.In the United States,the opportunity cost of producing 30,000 barrels of crude oil is _____ tractors.
Definitions:
Price Elastic
Descriptive of a product's demand sensitivity to changes in its price; high elasticity indicates demand significantly varies with price.
Advertising
The activity or profession of producing advertisements for commercial products or services.
Elastic Demand
A situation where the quantity demanded of a good or service significantly changes in response to a change in price.
Total Revenue
The total amount of money generated by the sale of goods or services, calculated as the unit price multiplied by the quantity sold.
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