Dear Jeffrey,
there is not any algorithm that can calculate a selling price for any good, because the parameters include human life.

Why human life cannot be framed into a mathematical system is only a question of belief.

Those who believe differently, follow a religion whose priests are the bankers.

You must endeavor to find the “Just price” for your goods. It is a question of experience in the trade of selling things to the people.

Be generous when you buy, generous when you sell, and kind when you ask for your due.