We checked with Labels for Education and here is the response: "The 2 code numbers from the outer case is needed and they will show the product name with a UPC number and another number that looks like it was stamped on. If you are still unable to tell what the 2 code numbers are, please send in a portion of the case that has the product name on it and your school will receive credit."
Also, here's a toll-free number you could use to try to reach them for more information: 1-800-424-5331. Good luck!
- Rose H
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