To find the final price of the headphones after the mail-in rebate, you subtract the rebate amount from the original price.
Original price of the headphones: $44.99
Mail-in rebate: $25.00
Final price = Original price - Rebate
Final price = $44.99 - $25.00
Final price = $19.99
The final price of the headphones after the $25 mail-in rebate is $19.99.