You own a bottle of wine currently valued at $500. The value of this wine increases by $100 per year. The market interest rate is 10%. You have a buyer who would like to buy it from you right now for...

You own a bottle of wine currently valued at $500. The value of this wine increases by $100 per year. The market interest rate is 10%. You have a buyer who would like to buy it from you right now for $620. Should you sell it? If not today, when should you sell it then? Explain using math and a graph