This is version 1 of the MyExpenses Windows 8 line of business demo app.
The app is written in XAML and C#. It calls a WCF service that works with a SQL Server database. The app uses the Callisto toolkit. You can get it at https://github.com/timheuer/callisto.
The Expenses.sql file contains the SQL to create the Expenses database.
The ExpensesWCFService.zip file contains the WCF service, also written in C#. You should create a WCF service. Create an Entity Framework model and point it to the Expenses database. Then copy the code from this.
Once you have the WCF service set up, change the service reference in the Expenses app project to point to it.
The My Expenses App Demo Script contains a walkthrough of the app and showcases it features.