Your OP probably is solved by now, but may I suggest some alterations?

a) If the "name" columns are to be equal, you would need only one of them,

b) if a word is present in one of the files, and missing in the other, you could assume this as a value of zero, resulting in

corrotto   +0.00439
tradizioni -0.00234
...

[download]
Update: c) and do the formatting/alignment of decimal points (and sorting, like Kenosis in Re: Aligning text and then perfom calculations) after doing the calculations

In reply to Re: Aligning text and then perfom calculations by soonix
in thread Aligning text and then perfom calculations by epimenidecretese

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