The following problem analyzes the South African market for limes$.$ Based on the information from the previous graph, absent international trade total surplus is

The following graph shows the same domestic supply and demand curves for limes in South Africa. Now, suppose that the South African government

changes its stance on international trade, deciding to allow free trade in limes$.$ The horizontal black line $(P_W)$ represents the world price of limes at

$$800$ per ton. Assume that South Africa's entry into the world market for limes has no effect on the world price and there are no transportation or

transaction costs associated with international trade in limes$.$ Also assume that domestic suppliers will satisfy domestic demand as much as possible

before any exporting or importing takes place.

Use the green triangle $($triangle symbol$)$ to shade in the area representing consumer surplus, and then use the purple triangle $($diamond symbol$)$ to

shade in the area representing producer surplus. When South Africa adjusts its trade policy to allow free trade of limes$,$ the price of one ton of limes in South Africa becomes $$800.$ At this price,

J tons of limes will be demanded in South Africa, and

tons will be supplied by domestic suppliers.

Therefore, South Africa will export

tons of limes$.$

Using the information from the previous tasks, complete the following table to analyze the welfare effect of allowing free trade.

With Free Trade

$($Dollars$)$

Without Free Trade

$($Dollars$)$

When South Africa allows free trade, the country's producer surplus

by

$,$ and consumer surplus

by

$.$ Therefore, the net effect of allowing international trade on South Africa's total surplus is a $.$

of

The graph below shows the domestic supply and demand curves for limes in South Africa. Assume that South Africa's government does not currently

permit international trade in limes$.$

Use the black point $($plus symbol$)$ to denote the equilibrium price of one ton of limes and the equilibrium quantity of limes in South Africa without

international trade. Next, use the green triangle $($triangle symbol$)$ to shade in the area that represents consumer surplus in equilibrium. Finally, use

the purple triangle $($diamond symbol$)$ to shade in the area that represents producer surplus in equilibrium.