Recall your reading of Economic Organisation of a P.O.W. Camp

a. Cigarettes became the currency used, even for nonsmokers, because they could barter for the cigarettes and then buy other things... but why cigarettes? What made cigarettes a resource that could be used like normal currency compared to other resources?

b. They talk about how everything hada "just price". What exactly is this, and how did everyone know what it was without knowing why?