Suppose you see three-month European calls with strikes of 900, 1,000, and 1,100, all on the same underlying trading, at 142, 84, and 46, respectively. Three-month zero-coupon bonds are trading at 0.9901 per dollar of face. If you buy a butterfly, financing the purchase by borrowing on a three-month term, for what realized underlying prices at maturity will you realize a profit in three months?