That is correct. I just assumed it was a minimum charge. I didn't even look at the invoice. But, it was worth every penny to me. It saved me several hours of time and I was able to finish my day. And, this was not the dealer I bought the tractor from. This was a dealer about 80 miles from my shop. They just happened to be close to where I was working on that day.
I got the new rim today and took it to my local tire shop. They were not able to put one of the new studs in place because the threads in the hub are messed up and need to be cleaned. But, now I have a new rim and 5 lugs holding it on. I even went back over the 5 lugs with a breaker bar after I got it home, just to be sure.