Surgery for our family dog Sitchi

We are in desperate need of help! Our family dog was hit by a car tonight (1/3/15) and her back leg is broken. It broke in a spot where it can't heal itself and she needs to have surgery on Monday (1/5/15).  We are a low income family and cannot afford this surgery so we are asking for any kind of donation to help us save a part of our family. Anything will help. We appreciate anything and everything anybody can help with and thank you dearly in advance. Please help us save our baby!