That is about the going rate. I have a hose machine here. I charge $10 for the simple ends and 1/2 two wire hose is right at $5 per foot. So if I had made them the cost would have been: 4 x $5 = $20 plus 2 x $10 = $20 for total of $40.
So they where not out of line. The cost of all supplies is sky rocketing and I don't think we have seen anything yet. The government debt is going to eventually cause inflation that the Feds can't hide. Then high energy cost will help finish of the economy. I am afraid tough time are in our future.