A bonus package pays an employee $1,000 at the end of the first year, $1,500 at the end of the second year, $2,000 at the end of the third year, and so on, continuing to increase by $500 every year for the first nine years of employment. What is the present value today of the bonus package at 10% interest?

$14,006

$15,470

$18,745

$15,088