[rahbert]

your 1.5 liters of 100 proof is only 50% ETOH by volume,
the rest is water.

[Herakles]

"your 1.5 liters of 100 proof is only 50% ETOH by volume,
the rest is water"

Then my calculations would be on the low side of the cost.

Don't know if you remember the last gas shortage, but I think some people got caught adding water to the gas - just a trip down memory lane.