that's not a great argument: any professional who doesn't know their operating costs is barely a professional would you be more enamored by roofers who came to

that's not a great argument: any professional who doesn't know their operating costs is barely a professional would you be more enamored by roofers who came to your house and couldn't break down your quote because they were too professional to know the cost of asphalt shingles? is it more sophisticated to you that you go to a fish market and the price of the goods isn't listed and you have to ask the cashier for every catch? perhaps we should all be artists who walk in to supply stores purchasing oil paints not caring what the tubes costs because you're not the target if you want to know the cost of your materials