Yes, Excel has a feature called Custom Number Formats that can be used to generate paragraph numbers like 1.0, 1.1, 1.1.1, 1.2, etc. Here's how you can do it:

1. Select the cells where you want to generate the paragraph numbers.
2. Right-click and select "Format Cells" from the context menu.
3. In the Format Cells dialog box, select the "Custom" category.
4. In the "Type" field, enter the following format code: "0"."0"#
5. Click "OK" to apply the format.

Now, when you enter "1" in the first cell, Excel will automatically generate the number "1.0". When you enter "1" in the next cell, Excel will generate "1.1", and so on. If you want to generate a sub-paragraph number like "1.1.1", simply enter "1" in the next cell and Excel will generate the number for you.

You can also use the Autofill feature to quickly generate a series of paragraph numbers. Simply enter the starting number in the first cell, select the cell, and drag the fill handle (the small square in the bottom right corner of the cell) down to the last cell where you want to generate the numbers.

I hope this helps you tie your Work Breakdown Structure in Project to your Statement of Work in Word and track costs in Excel more efficiently!