In Figure 20.1, at what price is the elasticity of demand unitary? Suppose consumers buy 50 million packs of cigarettes per month at a price of $5 per pack. If a $1 tax is added to that price, In Figure 20.1, at what price is the elasticity of demand unitary? Suppose consumers buy 50 million packs of cigarettes per month at a price of $5 per pack. If a $1 tax is added to that price