Multiple choice question.  There are two closely related crops, X and Y, with the following demand functions QX = 180 - 2PX + PY and QY = 150 + PX - PY where QX is the quantity of X, PX is the price of X, QY is the quantity of Y, and PY is the price of Y. These two crops are grown in two widely separated countries so there is no interrelationship between the supply curves. The short-run perfectly inelastic supply for X is 150 while the short-run perfectly inelastic supply for Y is 100. In equilibrium, the prices are a) PX = 80, PY = 130. b) PX = 40, PY = 65. c) PX = 60, PY = 120. d) PX = 30, PY = 80.

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Multiple choice question. 

There are two closely related crops, X and Y, with the following demand functions QX = 180
- 2PX + PY and QY = 150 + PX - PY where QX is the quantity of X, PX is the price of X, QY is
the quantity of Y, and PY is the price of Y. These two crops are grown in two widely separated
countries so there is no interrelationship between the supply curves. The short-run perfectly
inelastic supply for X is 150 while the short-run perfectly inelastic supply for Y is 100. In
equilibrium, the prices are
a) PX = 80, PY = 130.
b) PX = 40, PY = 65.
c) PX = 60, PY = 120.
d) PX = 30, PY = 80.

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