Use an Excel workbook as master copy, Google Sheets files reference it

How can link excel sheet to google sheet?

What I want is one mother/main copy (of excel which I am attaching here) visible only to me (back end) and other sub copies (with columns in yellow hidden in them) front end which will be used by my team members. The reason why I don't want them to see columns in yellow is because if they notice the formulas applied there is a scope of manipulation in the formulas, which should not happen. Please help me here.

Thanks,
Danish