Raise the hood, stand there and look at this engine for awhile and try to figure out how in the hell can this even be done on the drivers side!! That should help you to understand the charge for labor.....maybe! That is a good price, btw..!!
You remove all that is necessary to be able to get to, and remove the valve covers, then with new gaskets in place, you need to put everything back and make it run properly. Nothing like experience. Shop around.