Sales. One component of your profit margin is your sales. Generally, the more coffee you sell, the higher your profit. There are a couple of things you can do to make sure your sales are as high as they can be. First, serve quality products. Second, hire a friendly staff.
Here, Annette Bening is in nerd glasses, those thick black frames that have become increasingly popular over the past 4 years (or so). You can see how her look is instantly transformed from the previous picture, just because of a change in frames. 3 of 19 Show All.
The business of manufacturing eyeglass frames and lenses made its most dramatic leap in the twentieth century with the rise of plastics. Plastic lenses are lighter in weight and can be manufactured as bifocals, trifocals, and quadrifocals to correct a wider range of vision problems.