get_supply and get_balance are not actions that you can use with cleos. Only the actions defined in the macro EOSIO_ABI( eosio::token, (create)(issue)(transfer) ) at the bottom of eosio.token.cpp can be used as actions with cleos. get_supply and get_balance are not exposed directly as actions, instead, I believe you would call them from inside other functions that you would write on your own. You can get the balance for rayadmin by doing
cleos get table eosio.asset rayadmin accounts
and the supply with
cleos get table eosio.asset SYS stat
RE: Understanding The eosio.token Contract