ASP.NET Billing system

I need a very basic billing system done in **asp.net/VB.NET/Sql server/Visual [login to view URL]** . Features: [login to view URL] invoices (*) [login to view URL] invoices [login to view URL] management (add/mod/del) [login to view URL] reports (**) [login to view URL] management (***) 6. System Login (****) The system must be well validated and tested **Help me choose your bid by explaining how the system will generate the recurring invoices and the database structure. ** (*) configurable billing cycle for each invoice/client: daily, each weekday each x weeks, each x day of each x months, each x day each x years. (**) clients can see invoice history, and admin can see invoices filtered by date, client, status (paid or not), amount. (***) payment will be processed manually, admin will add payments and the balance for each client will be calculated = sum(invoices) - sum(payments) (****) Login types: 1. client: can see his payment history and current balance. the clients table will have a username and password fields. 2. Admin: can access all the system (clients, payments, add invoices manually) ## Deliverables visual studio project with source files, sql generation script ## Platform windows, IIS, sql server, asp.net, web