Winterbourne is considering a takeover of Monkton Inc. Winterbourne has 18 million shares outstanding, which sell for $56 each. Monkton has 13 million shares outstanding, which sell for $28 each. Merger gains are estimated at $65 million. If Winterbourne has a price-earnings ratio of 15 and Monkton has a P/E ratio of 10, what should be the P/E ratio of the merged firm