The diagram below shows supply and demand curves for comic books in the domestic Canadian market.

FIGURE 20-5
Refer to Figure 20-5. The world price is $3 per comic book. After Canada opens up its borders to unrestricted international trade in comic books, quantity imported in Canada is ________ comic books per month.
◦ 120 thousand
◦ 240 thousand
◦ 360 thousand
◦ 600 thousand
◦ 840 thousand