Who can show me the solution of following task:
"In 1999, the population of this area was 961 400, and the population was increasing at roughly 9200 people per year. The average annual income was $30593 per capita, and this average was increasing at about $1400 per year (a little above the national average of about $1225 yearly). Use the Product Rule and these figures to estimate the rate at which total personal income was rising in the Richmond-Petersburg area in 1999. Explain the meaning of each term in the Product Rule."