Password for surplus calculator

Ive downloaded the file as instructed but then it asks for a password. Is this a paid feature that I get a password once paid or am I missing something.
Thanks guys!!

There’s no download, the tool lives in Google Sheets, the link makes a copy and that’s all you need to do.

https://docs.google.com/spreadsheets/d/1-gNtDx7LC5iA5KRLgGRup1gChK9OFSUn_kj4r8VW2AE/copy

thank you!!