Dear Sir/Madam

Currenty I have big problem for my excel file processing.
My computer specific is 2.5Ghz / 1G Ram made by Dell
My excel file is around 70 M size.
(Rows are about 4,2000 and columns are 20)

The reason why it is so big is that it includes some tariff.
In excel file , there is lookup function.

My problem is that whenever I process my excel file especially
running some lookup function, my computer says "Memory is full"

So I don't know how to manage my excel file without interrupting.
Do I have to buy more upgraded PC (for example 3.47 GHz and 1.5G Ram)?

Pls advise me any idea.




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Kind regards
S.Y Kim