I have to attend a funeral next week, and the family is asking that a donation be made to an organization in memory of the deceased. How much is an appropriate amount to donate? We are also sending an arrangement to the family. In case it matters, the person who passed is my soon-to-be brother-in-law's girlfriend's sister. We had met her (the deceased) only once or twice, but know his girlfriend quite well, as they've been dating for a couple of years.