I have a question, my digital camera is broken, and it's being fixed at cord camera right now, which will take up to 4-5 weeks, it is under warranty, and I don't know how to do that.. it was off ebay but it has a 90 days warranty on it.. how do I make a proof of that at the store to save me from paying $175?? They are getting parts from Casio to repair the camera, by the way.