Suppose you expect that the volatility of stock X is increasing and want to profit from the anticipated large price movements. But you are unsure about whether the price will rise or fall, so you construct a straddle by purchasing a put option and a call option. Both options have the same exercise price of $67 and both expire in one month. You paid $5 and $2 for the put option and the call option, respectively. If the price of stock X is $77 one month later, what is the profit of the straddle?