Potatoes.
Washington farmers produce around 0.2% of the nation's corn supply.
What area of the country produces one-third of the nations annual supply of lumber?
Supply
Under the mercantile system, the colonies were required to develop trade with other nations, produce manufactured goods, and supply raw materials.
What is the nation's milk supply?
bankers
management of the nations money supply
Marshall Plan.
For regulating the nations money supply
Oil
While Idaho is much better known for its potatoes, it does produce a significant portion of the nation's supply of hops. Idaho's farmers produce some 7 million to 8 million pounds of hops annually from around 4,000 acres devoted to the crop. This accounts for roughly 10% of the nation's supply, but is nowhere near Washington's 30,000 acres.
It is the demand and supply which determines the goods and services to produce in the economy.