I need someone to build me an scientific calculator app for Windows phone. Program language must be C# (Silverlight). The app should support WP7 and WP8 and should have all features and functions like classic sci-calculators. The design layout for this app is in the attachment. We'll consider only bids (PM's) which contain a short description where you explain which components will you use. (This way we'll filter real bidders from fake ones). Thanks!