Kautilya's Arthashastra 4.1.22

4.1.22

parārdhyānāṃ paṇo vetanaṃ, madhyamānām ardhapaṇaḥ, pratyavarāṇāṃ pādaḥ, sthūlakānāṃ māṣakadvimāṣakaṃ, dviguṇaṃ raktakānām //

For washing the best garments, the wages shall be one pana; for those of middle quality, half a pana; and for those of inferior quality ¼th of a pana.

For rough washing on big stones, the wages shall be ⅛th of a pana.