The FAM permissions are kind of a black box tbh. I just basically add every permission starting with 'FAM' because it's not clear (or documented as far as I've been able to find) what all is contained in each permission.
In theory it should be self-explanatory given the names of the perms, but I've run into issues too. Could try querying the FAM Asset Values record as that's kind of a subrecord that contains some of the dollar amounts.