Leviticus 25:52

25:52 but if only a few years remain until the jubilee, he must calculate for himself in keeping with the remaining years and refund it for his redemption.

Leviticus 27:3

27:3 the conversion value of the male from twenty years old up to sixty years old is fifty shekels by the standard of the sanctuary shekel.

Leviticus 27:5

27:5 If the person is from five years old up to twenty years old, the conversion value of the male is twenty shekels, and for the female ten shekels.