Just how green is the Canon X Mark I calculator? Well, for starters, it looks very Apple-sque, and is made up from recycled PowerShot lenses – at least where the glass elements are concerned. At $30 a pop, this makes for a very expensive calculator compared to those Made-in-China staples that tend to break down when you need it the most. Well you can tell that plenty of love has gone into its design, where the X Mark I will incorporates curves and designs that are not too far off from the award-winning range of PowerShot Digital cameras. Besides, it is fully solar-powered, helping reduce waste while making it virtually useable anywhere. Pick from either black or white colors.