I bought a new kitchen countertop through Lowes a few months ago, and this is exactly what they did. The countertop is priced by the square foot, but they writ

I bought a new kitchen countertop through Lowes a few months ago, and this is exactly what they did. The countertop is priced by the square foot, but they write up the total cost as labor so that they don't have to charge sales tax.