How do I add UPC/EAN values to Variable Products in WooCommerce?

There is an add-on available for users to input product/variation Brand, UPC and EAN. In order to add upc ean values to variable products in woocommerce, please find instructions and free plugin here: Additional Product Fields. upc for variable products in woocommerce Various merchants require you to provide Brand, UPC or EAN value when you are listing your products on their sites. If the merchant doesn’t already have the product that you are listing, you will have a compulsion to provide these values. So, in order to list your products and avoid feed listing errors, you will need to incorporate these values into the product feeds.

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