INTRODUCTION
Financial statement is one of information source needed by internal or external parties to make a decision. Therefore financial statement must provide information more realistic and describe actual firms' condition.
Generally, financial statements are reported using monetary unit and based on historical cost or conventional accounting. Conventional accounting assumes that the prices (monetary unit) are stable. Support of historical cost stated that historical cost can easily be verified, reflect objectivity, free from bias, and can easily be audited since it based on independent transaction between participants (Sugiarto; 2000: 81).