It's all a little like the tale of a roadside merchant who was asked to explain how he could sell rabbit… — Darrell Huff

It's all a little like the tale of a roadside merchant who was asked to explain how he could sell rabbit sandwiches so cheap. "Well," he said, "I have to put in some horse meat too. But I mix 'em fifty-fifty: one horse, one rabbit."

Source: Wikiquote · CC BY-SA 4.0