Deleting Duplicates In Range Of Rows?

Mar 22, 2013

I have the following problem within Excel. I have a dataset which contains duplicate values within a column(lets say A). I need to delete these duplicates in column A for a range of rows, where the range of the rows is based on column B. So for a given value in column B, lets say 5 which is 6 rows long all beneath each other, I need to delete the duplicates in column A.

A B
1 2234
4 2234
5 2234
4 2234
2 2234
3 2234
5 2234
5 2657
8 2657
9 2657
10 2657
8 2657
9 2657
2 2657

So above the red numbers need to be removed, automatically, since we have about 8000 rows in our dataset.

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sample3.xlsx

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