1. Start with the messy supplier CSV
The Baywave file is not a Shopify template. It mixes supplier operations fields, brand and artist data, product names, variant columns, UPC/EAN values, received quantities, costs, MSRP, image filenames, and row notes.
- Product names vary across rows, including hyphen and colon versions of the same record.
- Quantities mix plain numbers, blanks, and values like 8 ea.
- Cost, retail, and MSRP are inconsistent, with blank fields and currency formatting.