The shop I manage charges $97.50 labor (1.5 hrs)on Supras because there is a bit more work to get to the plugs. This includes inspect or replace air filter, plug wires, cap and rotor on N/As.
Fuel filter replacement is a seperate thing, and is $65 labor.
We also look over everything under the hood to catch a problem before it puts you on the side of the road (say " G.D. it, I just had it in the shop, why didn't they tell me about this"?)
Check includes automatic trans fluid, coolant, p/s oil, engine oil, hoses, vacuum lines, wiring, leaks, etc.