Excel 2010 and 2007 Add-In

C# code for new Add-in in Excel - new family of charts. Excel versions: 2010 and 2007. For the sake of project: line chart should be implemented. 2 versions: 1. Add-in will be deployed as a new tab in Excel 2. Add-in will be deployed as a button in Insert tab, just next to Charts section. If you can provide only one of the above, state it clearly otherwise the quote will be considered for both. Inside user should be able to choose the new chart and select some data. The control should behave exactly as a native excel chart, having all the necessary options for selection and formatting. User should be able to copy and paste the control in different spreadsheets. If you are missing an information that is crucial for you to quote or establish feasibility, don't hesitate to write and I shall update the project description.