I am also in WA, but Western. Trims are about $35 to $40. Shoes run the whole gambit depending on how does your horse. I have it cost as little as $65 for fronts (which my horse will get tomorrow) to $280 for eggbars fronts. I would say that a 'normal' range for shoes on all four around here runs about $85 to $200.
I always make sure to ask before scheduling the farrier. And price does not always mean good or bad work... the last one I had I was paying $120 for fronts and he lamed my horse. The current farrier was actually able to look past my horse's color and understand that he is NOT a paint horse, but a sadddlebred and has different angles needed for comfortable movement.