Outrageous overbill by Kanter Automotive

Try and explain or justify all you want. That amount of mark up IMO and I speak only for myself, is plain outragous. Every business man is in business to make money, I do it also. Just what did the customer recieve for the extra $100.00 charge if the entire job was $146.44? I have owned an auto parts store C&R discount auto parts and a franchise of Don Garlits speed shop. And I can state that I wasn't able to make that sort of profit.
Well one thing possitive did come from this experience. I know where and where not to spend my money.