A regular EAN/UPC barcode has the 13 digits of an ISBN. The extra barcode to the right has the price, but setting a publisher price is illegal in most countries and also the shop's Point of Sale / database only needs the ISBN. Draft2Digital wrongly insist the book must have it and if there is no price it's set to 90000. I've not seen it in Irish or UK book shops for years, or on books bought from Amazon USA or UK.
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