Borg tire stems

I just had something like the Borg stems installed at the local Discount Tire store. Took the two guys just over 1 hour and 20 minutes to remove the 4 rear tires, break them down, remove the original stems, intall my new longer stems, balance and reinstall. They did a good job, were careful and made sure everything was done correctly. Was charged $100. I thought it was going to be less, but was not going to argue about the costs.