Answer: A. $1200
Explanation:
The Gross Domestic Product of a nation is the dollar value of all FINAL goods produced within the borders of the said nation during a specific period of time, usually a year.
Final is highlighted because INTERMEDIATE goods are not included because if they were, the GDP would be OVERSTATED as there would be Double Counting of goods and services.
$1200 was the final price in the chain and will be counted in GDP as it encompasses all the processes the cloth went through.