Try this Cola...
If you have three columns of data as in your example above... eg A,B,C..
(1) Do a Select All and sort
(2) Paste the formula =if($a1<>$a2,a1,"") into three empty columns beside each row of info (eg cols D,E,F)
This should show all the info from all the last iterations only.
(3) Select the new data from the three new columns and sort these columns only. (Alteratively copy the new data and "Paste Special -> Values" into a new worksheet and then Sort All).. This will get rid of all the blank lines.
Voila!
(Note that this assumes your info starts at column A.. if it starts at another column you will need to change the formula accordingly.)
If it works you can probably put it into a macro for ease of future use.
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