Macroeconomics 11th Edition by Michael Parkin

Exercise 9

Use the information on the U.S. wholesale market for roses to Problem.
Wholesalers of roses (the firms that supply your local flower shop with roses for Valentine's Day) buy and sell roses in containers that hold 120 stems. The table provides information about the wholesale market for roses in the United States. The demand schedule is the wholesalers' demand and the supply schedule is the U.S. rose growers' supply.
Wholesalers can buy roses at auction in Aalsmeer, Holland, for $125 per container.
If the United States puts a tariff of $25 per container on imports of roses, explain how the U.S. price of roses, the quantity of roses bought, the quantity produced in the United States, and the quantity imported change.