What is the cost to remove the zanthomas on both my upper eyelids and remove some of the excess skin and tissue?

Removal of the xanthomas can be incorporated into an upper lid lift.  My fee is about $2500.  I think you'll find that price pretty average.

The cost to remove xanthomas and excess skin on the upper eyelids will vary by surgeon and the type of anesthesia used.  I would recommend getting estimates from several surgeons so that you get a variety of options.