As per the given case, the amount that is added to GDP is $350.
GDP refers to the measure of all final goods and services that have been bought by the final user produced in the country.
As per the given case, Farmer smith bought seed and fertilizer for $100. He grew wheat that he sold to the wander bread company. Consumers bought the bread from the grocery for $350. Therefore, it was added to the GDP.
So, $350 was added to the GDP.
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