the estimated spend for Q3 is a million dollars.
closed as general reference by FumbleFingers, cornbread ninja 麵包忍者, MετάEd, tchrist, kiamlaluno Sep 3 '12 at 23:52
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It comes from the verb spend and according to the Oxford English Dictionary, the noun (the action of spending money or the amount spent) has been used since before 1688, in The works of John Bunyan: with an introduction to each treatise, notes, and a sketch of his life, times, and contemporaries:
Or, specifically as the amount spent, the earliest quotation is from 1976, in Computers in Higher Education & Research: