Calendar spread Mini-Case question; R15 page 281-282

This question is from 7.5 Calendar Spread, Question 2, the third scenario. In this scenario, the solution on page 282 notes that Ivanka has to settle her short put which is in-the-money (bad for her), but she also has a long put with 3 months left on it. The long put is deep in the money because the Euro Stoxx 50 has declined. The text states that its intrinsic value is 515 EUR. 500 EUR is the intrinsic value and 15 EUR is time value.

How do they come up with time value of 15??