How much $$$ to replace a valve cover gasket?

I took it into the Suby dealer yesterday after I noticed it was consistently leaving a puddle about the size of a quarter. The dealer said a valve cover gasket is leaking. The dealer wants $480 which includes parts and labor. The labor rate is $72/hour. Does this price sound right? How many hours of labor do you think it will take? The gasket itself is less than $50, right?