The city of Animaltown has built a new bridge across the river separating the two halves of the city for use by its residents. It is trying to decide whether to impose a toll and, if so, how much to charge; it would need to collect $28,000 per hour to finance the bridge, but if it collects less than that, it will finance the remainder of the expense from general tax revenues. City planners estimate a local demand curve for hourly use of the bridge to be Q = 2,800 − 100P. The bridge will be able to accommodate 2,000 cars per hour without congestion. If the cost of collecting a toll is negligible, is it more efficient to collect a toll or not? If so, how much should Animaltown charge for crossing the bridge?