Husband should have taken that Ram and the bill back to the store and had a chat with the Manager! I would have him explain WHY she was not given a pre work estimate?
And then ask that Manager if they rely on repeat customers?
Thats just Highway Robbery! Sounds as though they took advantage of her!
Unless of course she did sign a work estimate!
Oh and those that buy all that stuff and take it to the mechanic/ shop to have them do the work,,, had a friend that worked at a speedy lube place, Didn't matter,, they got the cheap filters and what ever was in the big blue barrel for oil! Unless you crawl under there and check your just guessing that they used your stuff! Or you stand there and watch them!