Diagnostic charge is rather common I think. Don't know what the book is on a hub & bearing assembly, but if they did the same job on the other side for 1 hr. I'd certainly bring that to their attention.
The first time is warranty time, the second would be COD.Wheel Hub
Replace
Front Suspension
Hub & Bearing
One Side 1.1 1.3
Both Sides 1.8 2.1