We are a Microsoft Partner Software Development Company owned by Microsoft VB.NET MVP (an award by Microsoft) - Mr. Gaurav Khanna. We have expertise in creating Desktop, Web and Mobile applications. We have wide experience developing application using technologies like WPF, WCF, Silverlight, Windows Form, SQL Server, Windows Phone apps, Windows 8+ apps, VB.NET, C#, XML, Graphics Designing, etc.
We have gone through your requirement and we can easily create application as per your requirement. We have created similar invoice application for our client. We also have a Windows Phone app "Invoice Creator" available on store.
We would like to have more information about your software requirement so that we can understand better.
Thanks,
Volcor Software Team