Did anything you purchase come in a 4 pack? RTIS would probably be an abbreviation of the brand and seafd sid/sld is probably an abbreviated version of the product, the 5.00B may have something to do with weight, i hope that gives a little insight, if you call the store they should be able to tell you more
A 4 pack of canned catfood or tuna or crabmeat cans ?
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