काकणीद्वयं चास्य पलवेतनम् ॥ कZ_०४.१.४२ ॥
kākaṇīdvayaṃ cāsya palavetanam
ແລະຄ່າແຮງງານສໍາລັບວຽກຕາມມາດຕະວັດ «ປະລາ» ຂອງມັນ ແມ່ນ 2 ກາກະນີ.
Different materials/processes can require more labor, fuel, time, or expertise; a published differential fee reduces discretionary overcharging.