A warrant entitles the holder to purchase one (1) common share of Corona Corp. at an exercise price of $11 until Dec. 31, 2021. If the warrant holder exercised the warrant in Nov 2019 when the stock price was $15 and then sold the one Corona Corp. share in 2020 for $25. What would be his profit from selling the one Corona share?

Enter only numbers and decimal (do not use a $ sign): $