Perl: Editing an existing excel file

I solved this.

Please do help me with this,. I have the idea but not sure how to execute it. Thank you so much in advance.

These statements taken together make no sense at all.

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I mean i solved this error "Can't call method "AddCell" without a package or object reference at line 26. But i cant figure out this "first read the template file using e.g. Spreadsheet::ParseXLSX. Then create a new sheet using this data combined with the data in the text file using e.g. Excel::Writer::XLSX. I have this idea but i do not know how to execute it".

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