I had to lookup some of these points on SKUs, this is good background https://www.shopify.com/retail/what-is-a-sku-number https://www.shopify.com/retail/what-is

I had to lookup some of these points on SKUs, this is good background https://www.shopify.com/retail/what-is-a-sku-number https://www.shopify.com/retail/what-is-a-sku-number