Split Master Excel into separate worksheets by end node:
https://www.extendoffice.com/documents/excel/785-excel-save-export-sheet-as-new-workbook.html
Step 1: Delete End Node, Supplier. Supplier id, Web Item, UPC, Additional Information columns. Click Save.
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Swap Brand and MSC number columns (make brand column A)
Step 2: Split into workbooks by brand name: