Rice
Resident Smart Arse
How much does 100kg of wet rice weigh when dry? That has to be factored in to the net price.
Yes they factor this in. 15% grain total moisture is the starting point ideal. any up or down you get a percentage decrease in price for your rice. Too dry is a detriment as well as the grain fractures and causes broken rice.
Your original question is straight forward for every 1% over 15 there is 1 litre of water or 1 Kg per 100 Kg. Subtracting that from the original wet price will get them some form of accuracy.
Don't forget they will also grade the quality of your grain. Whiteness, sheen and length of grain. They do this with a cursory glance.