Rather than trying to sort out how VLOOKUP works on your worksheets, it would be much easier to help if you can post the perl code you are using to read the data, a small example of the data, and a description of the result you want. It seems like you may be able to read data into a hash using "customer number" as a key and the name as the value, but I'm just guessing at this point.
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Re^4: How to use a formula in perl
by padawan_linuxero (Scribe) on Jan 22, 2008 at 23:24 UTC
as you can see is just giving format to the file just that I can not find how to make the formula to work hope can you help me is the only thing missing to finish