Following the imposition of a price floor $2 above the equilibrium price, irate buyers convince Congress to repeal the price floor and to impose a price ceiling $1 below the former price floor. The resulting shortage is

$3

Explanation:

A price floor is when the government or an agency of the government sets the minimum price of a product. A price floor is binding if it is set above equilibrium price.

Price ceiling is when the government or an agency of the government sets the maximum price for a product. It is binding when it is set below equilibrium price.

Equilibrium price is the price at which quantity demand equal quantity supplied. Above equilibrium price there is a surplus - quantity supplied exceeds quantity demanded.

Below equilibrium price there is a shortage - quantity demanded exceeds quantity supplied

Shortage = $12 - $9 = $3

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