Consider Two Cars Manufactured by Chevrolet in 2009

Consider two cars manufactured by Chevrolet in 2009. During 2009, Chevrolet sells one of the two cars to Sean for $24,000. Later in the same year, Sean sells the car to Kati for $19,000. The second automobile, with a market value of $30,000, is unsold at the end of 2010 and it remains in Chevrolet's inventory. The transactions just described contribute how much to GDP for 2009?

A) $24,000
B) $43,000
C) $54,000
D) $73,000