What is the best number of ancestral temple donations?

There is no regulation on the amount of donations from rural ancestral temples. Since it is a donation, it can be as much as one yuan, 10 yuan, 100 yuan or 2000 yuan. There is no standard answer. My mother donated 50 yuan when our village ancestral hall donated money. Someone donated 20 yuan, and someone donated something. Now they are all living well. Anyway, we have never heard of the law of singular or even numbers here.