I don't tell him what it cost just that they need it.
My dh is having trouble with the cost of ongoing appointment and clinic trips so the little stuff doesn't matter. But he is always playing down what is wrong with them. Thinks that I am on a crusade.
Have you told him how you feel when this happens? I did a few days ago and even if it didn't fix any thing at least I know what he is thinking.
Men are hard to get. I have to hit mine with a (figurative) brick. He wouldn't understand otherwise. He just doesn't think the same or have the mummy instinct.