A warrant entitles the holder to purchase one (1) common share of Corona Corp. at an exercise price of $12 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 $20. What would be his profit from selling the one Corona share? Enter only numbers and decimal (do not use a $ sign): $