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This from the Children's Newspaper dated 19th July 1924. Well they had to wait until 1971 before the problem was solved, although not quite as suggested here.
Anyone who remembers trying to add, subtract or multiply £.s.d with its 12 pence to the shilling and 20 shillings to the pound will be happy we decimalised. just try calculating (in your head) the change you'd get from a tenner if you bought items at £1 13s 9d and £5 9s 11d.
(£2 16s 4d - I think)