He wants to know how many cents per mile when he redeems, not flys to earn.
Divide the ticket cost by the number of miles needed for the ticket for award travel.
$500 ticket / 25,000 miles is 2 cents a mile for example.
2.75 cents a mile would only apply for Envoy class and *maybe* first class.
No one in their right mind would pay 2.75 cents per mile for coach.