Susan Crossing purchased a used Ford Focus for $12,000. Since purchasing the car, she has spent $5,450 on parts and labor for a new stereo system, new paint job, new tires and a new muffler. Unfortunately, the car needs a few more major repairs. The brake rotors and pads must be replaced and the radiator has sprung a leak. The repairs are estimated to cost $2,500. Susan has looked around at other cars and has found a used Honda Civic for $10,500 that is in very good condition and is approximately the same age as the Ford Focus for $10,500. Susan can sell her Ford Focus for $8,500. What should Susan do?