Why give up ground now? You've gotten this far and now your brake cables know who's the mom.
If you want to fix it, go down and buy some cable housing, brake cables ferrules (the little metal things at the ends of your cables) and a cable cutter (about $30-$40 but worth the investment). The rest of your cables look fine. Make sure you get brake cable housing. Brake and derailluer cables aren't the same thickness.
And please tell me which shop you went it, it's been driving me crazy? It wasn't Sellwood Cycles was it?
re-cur-sion ri'-ker-shen n: see recursion