My car? The water pump was $26, the gasket set $36. Labor, free, DIY.
On your specific M./M/Y and your skills, I cant hazard to guess.
Water pump on a Model "A" is simple; Hard on an '04 Pacifica.
Head gaskets Easy on a 45" Harley model "W"; Hard on any Vee type cage like a V-10 Cummins.
Just "new head gasket" might Also require check for wharpage of head, pressure test; maybe valve job, maybe shaving. If a vee type needs it, it's shaving for two heads plus intake manifold. $$. I find better and cheaper to get exchange head(s) if any doubt. Very easy to put more machine work into old head(s) than worth--heliarcing, shaving, knurling, etc.
I will stick my neck out and say $1500 for a shop, not dealer.