Final answer:
The GDP of the nation is the market value of the final goods produced, which in this case is the $250 value of the bookshelves made from the lumber.
Step-by-step explanation:
To calculate the Gross Domestic Product (GDP) of a nation, we assess the value of the final goods and services produced. In the case of this small nation, the production process includes three stages: harvesting trees, processing them into lumber, and then turning the lumber into bookshelves. The value of the final product is the sum of the market values of the final goods produced, which in this case are the bookshelves.
The country cut down trees worth $200 and turned a portion of them into $150 worth of lumber. Not all of the trees became lumber; hence only the lumber's value contributes to GDP as it moves to the next production phase. Finally, $100 worth of lumber was used to create $250 worth of bookshelves. When measuring GDP, we only consider these bookshelves' market value since they are the final product. Therefore, the GDP of this nation is $250, which is the market value of the bookshelves, the final good produced.