Excel Metadata Correction

I have one Excel book with two sheets, namely SheetA & SheetB. Both the sheets have hundreds of metadata. But in SheetB some information is missing like document numbers which can be found in SheetA. I want you to fetch these missing document numbers from SheetB and fix SheetB... (Budget: ₹600 - ₹1500 INR, Jobs: Data Analysis, Data Entry, Data Management, Data Processing, Excel)