"Rick Blaine" wrote in message

Consider the vending machines that would only accept silver coins when
candy
bars cost a nickle. When the time came that a price increase was
necessary, all
they could do would be to double the product price to go to the next coin
increment. As that would have been unacceptable, they did price increases
by
reducing the candy weight.

They sold cigarettes in vending machines for 23¢. Put a quarter in and the
pack of smokes had two pennies on the side for your change. Free pack of
matches was dispensed also.