Check this USCIS website or read I-485 Instructions:
Application to Register Permanent Residence or Adjust Status | USCIS
Age 14–78 |
$1,140 |
$85 |
$1,225 |
Issue one check of $1,225 for the filing.
By the way, no filing fee for I-765 fro EAD and I-131 for AP in this case.