What did early south american civilization do to promote farming

Aproduction order quantity problem has a daily demand rate = 10 and a daily production rate = 50. the production order quantity for this problem is approximately 612 units. what is the average inventory for this problem?

Suppose that each country completely specializes in the production of the good in which it has a comparative advantage, producing only that good. in this case, the country that produces jeans will produce million pairs per week, and the country that produces corn will produce million bushels per week.

What is the purpose of the us international trade association?