Advanced Analysis: Refer to the following table, in which Q_d is the quantity of loonies demanded, P is the dollar price of loonies, Q_s is the quantity of loonies supplied in year 1, and Q_s' is the quantity of loonies supplied in year 2. All quantities are in billions. Assume the exchange rate is fixed against the dollar at 120 dollars = 1 loonie.

Qd	P	Qs	Qs'
40	135	120	80
60	130	100	60
80	125	80	40
100	120	60	20