Consider an American put option on a stock expiring in 9 months. The annualized volatility of the stock, which pays no dividends, is 0.3. The risk-free rate is 10% per annum (continuously-compounded). The strike price of the option is $120, and the current stock price is 100. What is the value of this American option based on a one-step Cox-Ross-Rubinstein model?