Answer: The amount realized on the sale of the land is $19500.
Explanation: The amount realized in the sale of the land is equal to the sale price less the commission of the real estate agent, that is:
21000 - 1500 = $ 19500
But in reality the operation generated a loss of $ 500 given by the difference between the price at which I bought the land and the amount realized in the sale, which is:
19500 - 20000 = $( - 500).