Never replaced a coil spring before, What is the average labor for coil spring replacement?

I got an estimate(labor only) from an Indy mechanic here for replacing all four coil springs on my 98;

Front = 3.20hrs x $79.5 = $254

Rear = 4hrs x $79.5 = $318

Total = $254+ $318 = $572


And my car is NOT even a quattro (AEB, FWD), really surprised at 4 hrs for the rear and I think it's overkill.. Any comments?