Quote:
Originally Posted by BetterRed
£.s.d. combined with avoirdupois units of mass and imperial units of length resulted in a deftness of mental arithmetic that you'd be hard pressed to find today. My mother could tell the man who sliced the ham how much he should charge for the 7¼ ounces of 9s.6½d ham as he was weighing it, ditto the cheese etc, and when she was finished - the total.
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That it's a lot harder to calculate is not a point in its favour!