What is the largest amount of money you sacrificed to help someone?

For the sake of this question, sacrifice means you did not expect to see the money again, even though there was a chance you might get it back but that chance was very slim. For instance you helped a stranger with a hotel room because they were mugged of their cash and cards, you purchased a tire to get a struggling young adult back on the rood so they can get to work and back, you paid the vet bill for the elderly man/lady you know because they could not afford to take care of one more dog/cat, things of that nature (but not limited to such). What was the largest amount of money you spent to do good never expecting to see it again?