काकणीद्वयं चास्य पलवेतनम् ॥ कZ_०४.१.४२ ॥
kākaṇīdvayaṃ cāsya palavetanam
இதன் பல-அளவு பணிக்கான கூலி இரண்டு காகணீகள்.
Different materials/processes can require more labor, fuel, time, or expertise; a published differential fee reduces discretionary overcharging.