Depending what garages/dealers charge per hour,these are the average hours to do the job;
Left or right
Standard tranny=2.0 hours each
Auto tranny right front=2.0
Auto tranny left front=3.1 hours
Most garages charge list price on parts.
If you find a axle for $100.00,the garage is going to charge more.
Not to rip you off,because that's the way all garages/dealers work.
All garages have a big over head.