I believe that pulp adventuring should not be bogged down with minutiae about how much a cigarette pack would cost (it's around 10 cents in case you really cared), and in general I would not have my players keep track of small expenses.
As a rule of thumb, bookkeeping is not required for anything
below 100$.
The obvious question is "what could you do with 100$, in 1932, in terms of raw purchasing power?
According to this "inflation converter":
Just divide current-day prices by 13, and you have a ballpark estimate of how the same stuff would cost in the '30s.
This is, obviously, a coarse-grained method, and a lot of other factors (low-automation, slower shipping, different consumer needs, to cite a few) could have a large impact on what the real price was. Nevertheless, I believe that just applying this simple ratio should be enough for a Pulp game.
In terms of flavor, remember to stress to your players that the 1929 stock market crash effects are still having a real impact in the USA, so unemployment is rampant, and this should play a part during social interaction with NPCs.
Strategically dropping small tips should make your PCs pretty popular, but on the other hand anyone with a steady job would be reluctant to do anything that could jeopardize his position (i.e. betraying his employer's trust), for fear of joining the unemployed masses.