A stock with an annual standard deviation of 11 percent currently sells for $61. The risk-free rate is 3.1 percent. What is the value of a European put option with a strike price of $70 and 100 days to expiration? (Use 365 days in a year. Do not round intermediate calculations. Round your answer to 2 decimal places. Omit the "$" sign in your response.)
Value of a European put option $ _________