Conner runs a rafting company on a local river. He runs two kinds of trips – a wild whitewater experience and a more mellow wildlife tour. If he spends the day only doing whitewater trips, he can do 3 trips per day; if he spends the day only doing wildlife trips, he can do 4 trips. If he does some of each, however, he can do more total trips: 2 whitewater trips and 3 wildlife trips. Suppose that Conner’s time is valued at $20 an hour. What can you say about his economies of scope? That is, what is the sign of his measure of economies of scope, SC?