Brendan buys a used car in April 2020 from his neighbor for $20,000. After one month, he loses his job and decides to sell the car to get some cash. He sells the car for $22,000 to a car dealer. The dealer fixes a few things here and there and sells the car for $27,000 in July 2020. Because of these transactions, the 2020 nominal GDP increases by ______ dollars.