Honestly... just open the repack and start sorting...
The DC are supposed to send repacks pre-sorted. That's why they "circle a number". It's to indicate what fill group the items are part of. Honestly, the odds of repack being sorted properly are pretty slim. I've found all sorts of stuff in the 2+ years I did hardlines breakout. It was comical. Course, I didn't see the humor in it, at 4am. I've retooled the process at my store and created a guide based off the numbers I knew. Then, during my last few months as breakout, the DC changed the numbering system. So, whatever I thought a number meant, was completely useless. Only a handful of numbers remained unaltered (our hardlines textiles... bath towels, drapes, kitchen towels... was always number 3 and in a large black repack).
If you don't know what the numbers mean, ask a more senior TM who's been breaking out to tell you. But ultimately, it's just easier to open the box and look.
A guide to repacks:
Large black repacks: Hardlines textiles and softlines everything.
Medium red repacks: Hardlines everything else
Medium white repacks: Electronics/security (these should be put in the cage/lockup).
Small red repacks: Entertainment media, cds, movies...
Putting repacks away... if you do anything to help receiving and backroom, when you empty a repack, please put it away properly. There's a nice diagram on every repack that explains the process. Simple and extremely helpful, especially for SWEEP day!