An article in the Wall Street Journal discussing the financial results for bookstore chain Barnes & Noble during the first quarter of 2019 reported that, compared with the same quarter in the previous year, the firm’s revenue was unchanged from $1.23 billion, while its profit had improved to $66.9 million from a loss of $63.5 million. How is it possible for Barnes & Noble’s profit to increase during the same period that its revenue was unchanged? Can Barnes & Noble maximize profit without maximizing revenue? Briefly explain.