Hmm seams how we dont really just stain a door usually there are many other things to do while you are there. But I can break it down for you ... Thank good were not in the door staining business because you really dont make much money its not a 30,000 sf building its a door.
Gel stain 1 door 1 side
1 hour to get stain
.5 to seal
.5 to varnish
Material = $40
2 hrs @ 50 = 100
Material = 40
Overhead on 140 = 56
Total Price $196.00 Is Cost
So should be 400 IMO
I would suggest not starting a door stainning company
Back to the original question Ben I would charge 500 I didnt consider sidelights and panels