Really, the only way that you can verify if they are being truthful is either to get under the car and have a look for yourself, or take it to another mechanic who you trust to look it over. I have had problems with shops trying to take advantage of me, as has many in my family. A lot of that seems fishy so I would get a second opinion, but the power steering flush is normal after a certain period. The rear brakes quote seems high unless they're replacing the rotors as well as the pads. You have a timing belt change coming up at 105k, but that's a little way off.
Never fully trust anyone who stands to make a profit off you. Get a second opinion.