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.
Beryllium metal is used in the aerospace and defense industries to make lightweight precision instruments. The mirrors of the Spitzer Space Telescope and the James Webb Space Telescope (JWST), which is scheduled for launch in 2018, are made of beryllium.