Copy Column B to Column C based on keyword in Column A

I have a spreadsheet containing a list of Devices and their meters in Column A. Each device has a different number of meter runs associated with it. ex A1=Device , A2 = Meter 0, A3 = Meter 1 etc. Column B holds the Device name and the corresponding meter runs names. I need to take the device name and add that to Column C next to the corresponding meter runs for each device. I have attached a small sample to illustrate what the current worksheet looks like.

I have roughly 10,000 meter runs what would be the easiest way to accomplish what I need?

Thank you everyone for your help.Capture1.PNG

This is the link to the same post I asked on a different forum yesterday as well. Thanks

Will you please attach a SMALL sample Excel workbook (10-20 rows of data is usually enough)? However, please give us an indication of the approximate number of rows of data you want the solution to work with (100, 1000, 100,000 or whatever). Please don't attach a picture of an Excel sheet (no-one will want to re-type all your stuff before starting).

1. It does NOT have to be your real sheet - mock up a SAMPLE if you need to. But not 1000's of rows!!! It makes manual checking so tedious. Whatever you do... make sure that all confidential information is removed first!!

2. Make sure that your sample data are truly REPRESENTATIVE of your real data. The use of unrepresentative data is very frustrating and can lead to long delays in reaching a solution.

3. Make sure that your desired solution is also shown (mock up the results manually).

4. Try to avoid using merged cells. They cause lots of problems!

Unfortunately the attachment icon doesn't work at the moment. So, to attach an Excel file you have to do the following: Just before posting, scroll down to Go Advanced and then scroll down to Manage Attachments. Now follow the instructions at the top of that screen.

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