Don't know. A single chromo tube is about 10 bucks retail, unless it is something exotic. So that is steep, but if he has to order a single part just for you that is probably what it costs him, plus a necesarry mark-up. 100-130 for labour is probably reasonable, when you consider fixturing, removal and clean-up, forming the new tube, and then joining it, and cleaning that up. Could it take 2 hours to do? And is a shop rate of 60+ reasonable, quite possibly. Would someone else quote less, maybe, particularly to the degree they do this kind of repair all the time, which would seem an unlikely shop to come across.
A little more info on the repair wouldn't help me any, but might help someone else. I just assumed you are talking about replacing a single broken tube. Which tube, and how oddball it may be could have a big affect on cost.