GSTR-9C AUDIT Return for Branch

I own a company with its HEAD OFFICE in Mumbai and BRANCH in Gujarat.
BOTH offices have turnover above 5 crores.
However, in GSTR-9 Annual return,
I have not combined the Gross Sales Turnover of both offices, but shown them separately.

Should I now mention the combined Gross Sales Turnover of both offices when filing the GSTR-9C Audit return?
IF YES, then should I do the same for Purchases as well? i.e. take both office's Total Purchases into consideration when filing the GSTR-9C Audit Return?

Thanks