“We lose money on every sale, but make it up on volume”
A bit of history of that joke: https://www.barrypopik.com/index.php/new_york_city/entry/we_...
> 6 February 1833, New York (NY) Evening Post, pg. 2, col. 2:
> Among the business anomalies which meet the eye of a stranger visiting New-York, are the placards exhibited in the windows of the retail shops, informing passers by that the stock in trade within is selling off at prime cost, or according to the more alluring announcement which some have adopted, at fifty per cent. less than cost. A person attracted by this lure to become a purchaser, must soon come to the conclusion that either the veracity of the dealer is not of the most scrupulous description, or else that he laid in his goods at enormous prices. One in the habit of passing these shops, must at least smile to perceive that notwithstanding their owners have been selling off their goods “at less than cost” for so long a time, their shelves continue to be as well filled as ever. We have heard of one individual, who “wishing to retire in consequence of declining health,” was five years disposing of his merchandise, “at prime cost,” and at the end of this time he found his capital so much augmented that he removed into a more busy part of the city, and entered into trade on a much larger scale than before. How is it that trades-people can sell their goods at less than they paid for them, and yet realize a handsome profit, is one of those mysteries of commerce which we never could penetrate. Perhaps they are like the Irish mercer, who, having assured a lady customer that the silk he desired to dispose of to her actually cost him more per yard than he charged for it, was asked how he then could afford to sell it so low. “Ah, madam, he replied, we depend for our profit on selling a large quantity.”
