At 05:50 PM 3/17/2010, David Beierl wrote...
fittings.  I've read (on a swap-tank holding cage at Home Depot) that
>the "standard fill" nowadays is 18# and that these particular
>swap-tanks contain 17# for some tortured justification.  And Haagen
>Dazs pints are now 14 fl oz! and ice cream half-gallons now typically
>56 fl oz)

Just tell them that you understand and agree with their logic, so
they'll also agree that the 80 cents you're paying is actually a
dollar.