Year                            1                      2                    3                   4

Free Cash Flow      $12 million       $18 million        $22 million     $26 million

Conundrum Mining is expected to generate the above free cash flows over the next four years, after which they are expected to grow at a rate of 6% per year. If the weighted average cost of capital is 12% and Conundrum has cash of $80 million, debt of $60 million, and 30 million shares outstanding, what is Conundrum's expected terminal value?

$413.4 million

$459.3 million

$505.3 million

$528.2 million