A small country that currently does not trade with the world has the following S and D curves for apples.
S=2P
D=12-P
Under pressure from apple growers, the government decides to put a per-unit subsidy the apple market that results in a new equilibrium quantity of 10 lbs of apples.
Calculate the per-unit subsidy (in $/lb) required to achieve this new equilibrium quantity of 10 apples and the government expenditure for such a plan.