How about the prices of products going up and the size of the product is shrinking.
Case in point is toilet paper. The rolls are now ½ inch smaller in width, than that of a year ago.
And, lets not forget candy bars. Remember back years ago when we were told the price of candy bars would be increasing, because of abad sugar crop in Louisiana? Candy bars almost doubled in costs. The next year, there was a bumper crop of sugar in Louisian, but the cost of a candy bar never came back down. Were the people lied to?
Also, the cost and fluctuation of a gallon of gasoline. Why and how it happens.