doesnt sound a million miles off, £35.00 per hour is pretty good, many garages are £60 - £120 per hour !! £117.00 for an alternator is not over the top..
£200 to replace a knackered alternator ? Total rip off IMO - less than 1/2 hr labour.
Plus it's not even a new one - don't go to that garage again !!
Re-conditioned alternators are made out of old knackered ones that have been handed in - money is normally knocked off because of this.
Anyway, too late now - at least you got some sort of a better deal.