A farmer grows corn, which she sells for $10; a miller buys the corn, grinds it, and

Question:

A farmer grows corn, which she sells for $10; a miller buys the corn, grinds it, and sells it as cornmeal for $15; a baker buys the cornmeal and sells it as corn muffins for $22. How much was contributed to GDP in these transactions? What was the value added of each person?

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