Problem
Many U.S. states have minimum price laws for cigarettes. Assume that the demand equation for cigarettes is QD = 4,000 - 300P and the supply equation is QS = -1,000 + 200P, with quantity in thousands of packs. The number of cigarette packs actually sold when a binding price floor of $12 is applied to this market will be _____. Draw the graph and show your work.