Pinion & front differential seal replacement cost on 2002 Chevrolet Tahoe

What is the cost to replace a pinion seal and a front differential seal on 4X4 tahoe

Asked by for the 2002 Chevrolet Tahoe
The parts run about $75 to $90 and the labor time is 1.4 to 4.5 if the spacer crush sleeve needs replacement
how much charging 4 the job