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I learned what to bring and what not to bring on the Oregon Trail. We also learned how much to buy such as axles if they brake. We decided that we were going to bring 6 extra axels if they brake. I thought we should bring four because it was not nesaccary to bring 6, because I had a feeling that we would not break all of the axles... they are made of steel thats why. And now I change my mind a that was smart buying six just because we can have extra axels. Also Independence Missouri has the cheapest materials so that I guess was smart.