Cost will vary greatly by facility and region. Some places will want to do
more work than others on the 60k. You should:
Replace spark plugs
Replace air filter
Change oil and filter
Clean and adjust rear brakes (if drum)
Replace timing belt (if not already done)
and visually inspect steering, brakes, tires, wipers, etc.
I would also strongly recommend draining and refilling the transmission
fluid. It's not that expensive, and it can't hurt. You should also
change your coolant if it's currently over two years old.
The tire rotation isn't critical, so if you haven't been doing it
routinely every 7500 miles, you should probably check your tire tread. If
none of them need replacement, you should probably do whatever will put the
best tires in the front if there's a significant wear difference between
front and rear.
And obviously, you don't really need to change your oil unless it's been
3000 miles since your last oil change. Most people will have the 60k
service done at whatever oil change falls closest to 60k miles.