To convert 1.1B to 1,100,000.00 in Microsoft Excel, you can use the following steps:

1. Select the cell(s) that contain the revenue data you want to convert.
2. Right-click on the selected cell(s) and choose "Format Cells" from the context menu.
3. In the "Format Cells" dialog box, select "Custom" from the list of categories.
4. In the "Type" field, enter the following format code: #,##0.00,,"M";[Red]-#,##0.00,,"M";#,##0.00,,"B";[Red]-#,##0.00,,"B"
5. Click "OK" to apply the custom format to the selected cell(s).

This custom format code will convert any revenue data that is displayed in the format of #.##B or #.##M to a standard number format with commas and two decimal places. For example, 1.1B will be converted to 1,100,000.00 and 1.23M will be converted to 1,230,000.00.

Note that the custom format code also includes color formatting for negative numbers. If you don't need this feature, you can remove the [Red] sections from the code.