If I were to return these items back to JcPenney's..?

A couple months ago I splurged and bought 5 purses that were on sale, $20.00 - $30.00 price range on all 5..I haven't used any of the bags, and all their tags are still attached however I don't have the original receipt. If I were to take these purses back to JcPenneys, would they be able to give me an in-store credit? If for some reason the purses are cheaper now than what I paid a couple months ago, could they just search the barcode into their computers to see the actual price I paid and just give me that price or would there not be a way of doing that?