Available brains

Norman, a lawyer, finds out he has a brain tumor, and it's inoperable. They have to do a brain transplant. Gerald, his physician, gives Norman a choice of available brains: there's a jar of rocket scientist brains for $10 an ounce, a jar of regular scientist brains for $15 an ounce, and a jar of lawyer brains for the
princely sum of $800 an ounce. The outraged lawyer says: This is a ripoff. How come the lawyer brains are so damned expensive? Gerald replies: Do you know how many lawyers it takes to get an ounce of brains?