Source: automotive news data center and R. L. Polk Marketing Systems GmbH, Adapted from the world almanac, 2006. Motor vehicle was reduction by country: For the matrixes below, each of the row entries represents the motor vehicle production for a specific country, in thousands. The first row is data from the years 1950, 1970, and 1990 and the second row is the years 2000, 2002, and 2004, respectively. Matrix A represents the United States, matrix B represents Canada, and matrix C represents Japan. Calculate A+B+C and explain the meaning for the entries.