Cost of Timing

[LeftAngle]

This is a quick question to the group about the commercial shop cost of replacing the timing chain and re-timing a R-16 motor.   The shop I took my 1970 S2 Federal to claims to have retimed it, but no such work was carried out. 

What would be a fair charge for retiming the R-16, without removing it from the car?

I’ve since completed the work myself, so the job’s done, but have no idea how much a professional mechanic would cost.  I’d like to know what to subtract for that and other charges for work not done from the bill. 

Thanks,
Bruce