BP is a big producer of a commodity: coffee.

BP is now a big producer of an unexpected commodity — coffee.BP BP, +5.51% BP, +5.39% saw a boost from its convenience stores, which sell, of course, gasoline, but also coffee and all sorts of odds and ends. BP has previously said it sells 150 million cups of coffee per year.What it calls convenience gross margin — a profit measure defined in 117 words in a glossary provided alongside quarterly results — rose 9% to $1.66 billion last year. “Its convenience-store business is a behemoth that should not be un ...