In October 2011, a 15-month call on the stock of Amazon.com , with an exercise price of $240, sold for $45.20. The stock price was $240. The risk-free interest rate was 4%. How much would you be willing to pay for a put on Amazon stock with the same maturity and exercise price? Assume that the Amazon options are European options. (Note: Amazon does not pay a dividend.) (Do not round intermediate calculations. Round your answer to 2 decimal places.)