When you entrust a friend to do something, is it appropriate to give some rewards? What do you think?

It fits perfectly. Things that can be solved with money in this world should never be solved with friendship, affection or human feelings. This is what my father taught me since I was a child. I didn't understand human feelings when I was a child. Later, I found out that the most eternal thing in this world is the interest relationship. Except for the interest relationship, everything is easy to go bad, so I let my friends do things. If she refuses to pay, I should invite him to dinner or give him something equivalent. Don't always ask for such help.