Scenario 9-2 • for a Small Country Called Boxland,the Equation of the of the Domestic

Multiple Choice

Scenario 9-2
• For a small country called Boxland,the equation of the domestic demand curve for
cardboard is ,
where represents the domestic quantity of cardboard demanded,in tons,and represents the price of a ton of cardboard.
• For Boxland,the equation of the domestic supply curve for cardboard is ,
where represents the domestic quantity of cardboard supplied,in tons,and again
represents the price of a ton of cardboard.
-Refer to Scenario 9-2.Suppose the world price of cardboard is $60.Then Boxland's gains from international trade in cardboard amount to

A) $145.
B) $160.
C) $210.
D) $320.