Fee: $325 plus $70 biometrics services fee if you are 14 years of age or older. If you are under 14 years of age, the fee is $225 with no biometric services fee. If you are 79 years of age or older, the fee is $325 with no biometrics services fee.
http://uscis.gov/graphics/formsfee/forms/i-485.htm
Fee: $325 plus $70 biometrics services fee if you are 14 years of age or older. If you are under 14 years of age, the fee is $225 with no biometric services fee. If you are 79 years of age or older, the fee is $325 with no biometrics services fee.