I have a main seal engine leak between the transmission and engine. How much to fix? on 1995 Chevrolet 1500 Pickup

The main rear engine seal is leaking as well as the seal on the end of the transmission. What is the typical repair costs?

Asked by for the 1995 Chevrolet 1500 Pickup
the trans has to be removed to gain acess to the rear main.
labor for 2 wd 7 hours
seal 18
labor for 4 wd 8.2
rear trans seal is 15
labor is 1 hour considering the trans is already out of the truck.