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per annum

adverb
 
 
(written abbreviation p.a.) formal

Definition

used in business when referring to an amount that is produced, sold, or spent each year: The country exports goods worth $600 million per annum.Relating to regular periods of timeForms of money and methods of payment
(Definition of per annum adverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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