What bugs me is, when I have a service done, oil is charged as individual litres (liters) as if supplied in 1 litre retail plastic bottles. They have a large tank of oil, it's got to be significantly cheaper even with a normal mark-up than we are charged.
Don't forget the extra charge for shop supplies and EPA disposal.
I had to get a bike inspected here in PA (something I never had to do in CA). Anyway, I was surprised to see a shop supply add-on when the only shop supply was a tissue with alcohol used to prepare the surface for the inspection sticker.