Billing System .net to SQL

VoIP Billing System; Interface – Nothing Fancy just need it to work and be user friendly Database – We will need integration with SQL Programming Language - .NET preferably 2 We will need the framework on completion of the project, we will use the programmer again and more frequently based on results. Invoicing – Need to export invoices as text, word and PDF docs. We need to be able to create and invoice with all call details (based on info in attached .csv) and also create invoices minus call details that only show total monthly cost. Margin – We need to be able to set the sell price of the calls by a total percentage across the board and also specify individual sell prices based on call category i.e Local, National, International and Mobile. Reports – By Source By Destination Total No of Calls Out and In (Holistically, per customer, per site and per user or source) Total Dollar Value (Holistically, per customer, per site and per user or source) Total No of Calls by Local, Interstate, International and Mobile Total Dollar Value by Local, Interstate, International and Mobile Please ask questions before bidding, priority will be given to high raters matched with good time.