Kautilya's Arthashastra 2.12.26

2.12.26

rūpikam aṣṭakaṃ śatam, pañcakaṃ śataṃ vyājīm, pārīkṣikam aṣṭabhāgikam, śatam, pañcaviṃśatipaṇam atyayaṃ ca anyatrakartṛkretṛvikretṛparīkṣitṛbhyaḥ //

The examiner of coins (rúpadarsaka) shall regulate currency both as a medium of exchange (vyávahárikim) and as legal tender admissible into the treasury (kosapravesyám): The premia levied on coins paid into the treasury shall be) 8 per cent, known as rúpika, 5 per cent known as vyáji, one-eighth pana per cent as páríkshika (testing charge), besides (cha) a fine of 25 pana to be imposed on offenders other than the manufacturer, the seller, the purchaser and the examiner.