Sure but your not amortizing your labor costs as compared to the rate of returns.
Granted with out analytic tied to your account there is no way to know how your product is treading as to daily sales and have to wait for the pay check to find out.
I would agree if it’s one off custom you could calculate your labor costs as part of a quote but you would make a hell of a lot more by leveraging you “product” as to similar priced items.
Check out.
In theory with a large enough market place you could make more than a million dollars on a .99 cent hat.
Here I’ll help you out. 