Where can you find a historical list of prices for common items, concerning inflation?

Question

It would be interesting to know the cost of a can of soda 3 years ago, 20,

thing like that.

Answer 1

There's a thing called CPI (Consumer Price Index) that tracks just this sort of thing, though I don't know whether a can of soda would be on it.

But it tracks prices of common things over time.

You might try some searching using that term, and surf around the results.