a customer asked me to seed a small area of his lawn that was trampled by the dogs. There is a bit of sporatic grass, the soil is pretty well packed and there is only about 100 square feet of it. i dont have an aerator so i was thinking id tear up what little grass was in the area and loosen the soil up a bit before i spread grass seed. will this work out alright and how much would you charge him for it? also, should i spread fertilzer?