In previous years, Orange Computer reacquired 2 million treasury shares at $21 per share and, later, 4 million treasury shares at $27 per share. What will be the credit to Treasury Stock if it now sells 3 million treasury shares at $30, and determines the cost of treasury shares sold on the Average Cost basis?

Group of answer choices

$75 million

$25 million

$81 million

$74 million

Could you please help me understand the answer to this problem and how you come to that conclusion? Thank you!!