The cost of replacing part of a cell phone video chip production line in 6 years is estimated to be $500,000. At an interest rate of 14% per year, compounded semiannually, the uniform amount that must be deposited into a sinking fund every 6 months is closest to:
(a) $21,335
(b) $24,825
(c) $27,950
(d) $97,995