please help me with this question. thanks

Problem On December 1, 2021, an internet company is operating a website named comet.com, which provides information about a comet that is predicted to make a dangerously close approach to earth on December 31, 2021. The company currently is making $10,000 per day from this website, but this profit is falling $300 per day. A number of other companies would like to have a website with the name comet.com and are willing to purchase the name. Currently, the top bidder is willing to pay $5,000,000 for the name, but the price is decreasing $5,000 per day. When should the internet company sell the website name in order to obtain the maximum profit