Lenders don't give you credit for what you are currently earning. They average your income from those sources over the last two years, then add that to your regular salary or hourly monthly income. If you want a shortcut that is usually close, get out your W2 forms for the last two years.
Mirror is simply made by taking a slab of plane glass then coating it on one planar side with a coating of silver which provides the reflecting part, but due to corrosive nture of silver the same side is coated with a layer of anti-corrosive paint to protect layer of mirror.
Most mirrors that you'll find in people's homes these days are what they call silver glass mirrors. These have a sheet of glass in front, and then a thin silver/copper film, and then a layer of paint. The paint is waterproof to prevent acid and moisture from getting in, which can damage the quality of the picture.