If you say so. But if the costs(meaning selling price) are 2/3 the price of silk and the price of one is 1.00 then the costs is .6667. On the other hand if it cost 4.00 then 2/3 would be 266.67 leaving 1.33.... not the way I’m looking at it . 4.00-.6667= 3.3333 profit. Remember our silk cost the same per unit to produce. Am I still wrong? If so I don’t understand what you are saying or you are using a “new math”