Use the following to answer questions :
Figure: The Market for Computers 
-(Figure: The Market for Computers) Look at the figure The Market for Computers. Assume that PA is the autarky price and PW is the world price. Consumer surplus without international trade would be area:
Definitions:
Profit
The earnings obtained when income from a business endeavor outstrips the total expenses, costs, and taxes necessary to maintain that endeavor.
Marginal Revenue
The additional income that is gained from selling one more unit of a product or service.
Price Change
A modification in the selling price of goods or services over a period.
Total Cost
The aggregate financial sum incurred by a firm in the production of goods or services, including both fixed and variable costs.
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