Consider an investor who buys two European calls and sells a European put, all based on one share of S and with same strike price K and maturity T, and who sells short one share of S. Assume all...

Consider an investor who buys two European calls and sells a European put, all based on one share of S and with same strike price K and maturity T, and who sells short one share of S. Assume all transaction cash is borrowed or invested and there is no arbitrage. Show that if at time T the calls are in the money, then the total profit of the investor is