We cannot calculate the point elasticity without an equation that defines the demand curve but, if we had that equation, we could use a technique in calculus called differentiation to work it out
Martin Luther King, Jr.: Nonviolent Strategies and Tactics for Social Change
These restrictions strictly apply explosive materials, chemicals (spray paint, fertilizers, bleach, etc.), wildlife safety items (like bear spray) and alcoholic beverages over 140 proof (such as grain alcohol and 151-proof rum).
I dont think it bears a lot of scrutiny
A number of public health groups, including the African American Tobacco Control Leadership Council and the National Medical Association (the countrys oldest organization representing African American physicians) say that the regulation is a crucial and long-awaited step
That is a very ferry-specific point: sometimes the shop is not just about savings, but about making a dull waiting window a bit more useful