If the cost of added oil and alkaline water is simply calculated, 1 gram is a few cents to a few cents. But if you make 1000g soap at a time, you need to make, cut and package it by hand for 3 hours before and after, and then let it cool for dozens of days. If you sell 1 gram at the price of 1 minute, you will earn tens of dollars, not counting tools, molds, labor, rent and water and electricity. ......