Wal Mart receipt codes...?

They're 12 digit codes to the right of product description... e.g. PARKAY BOWL 002700031150. (It's a tub of margarine, I know) Ok, before you jump the gun and proclaim "DUH! UPC CODE!!!", I can't find a sigle item on my receipt that that # shows up as a valid upc. If it's not a... show more They're 12 digit codes to the right of product description...
e.g. PARKAY BOWL 002700031150. (It's a tub of margarine, I know)

Ok, before you jump the gun and proclaim "DUH! UPC CODE!!!", I can't find a sigle item on my receipt that that # shows up as a valid upc.

If it's not a upc code, tell me what it is, and if you say it is a upc code...I want proof (i.e. url or hyperlink to where I can look it up for myself)!!

Here's another product from my receipt that's not so obvious-
MER OL FASH 001220000005, and 18PK X-LARGE 081390500120
Update: Yea, they are 12 digits, and a upc code is printed on the packaging AT THE FACTORY, not the particular retail outlet you purchase them at. So, again, please specificly answer the question or don't waiste your & my time, thanks
Update 2: As to the remark, "There is no Internet link where you can look up UPC bar codes...", well, WRONG, yes there is.

http://www.upcdatabase.com/
http://upcdata.info/
http://www.checkupc.com/, etc, etc.
Update 3: I've tried them all.
Update 4: OK, I figured this one out. Wal-Mart uses an EAN-13 system, European Article Number ( renamed International Article Number[13 digits instead of 12]), and omits the last digit of the EAN-13 # on their customer receipts for some reason.


Do I get points for answering my own question?? I wish!!
Update 5: Thanks to http://upcdata.info/upc/0027000311509/
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