Leviticus 27:4-14

4 And if it is a female, then thy estimation shall be thirty shekels.
5 And if it is from five years old even unto twenty years old, then thy estimation shall be of the male twenty shekels, and for the female ten shekels.
6 And if it is from a month old even unto five years old, then thy estimation shall be of the male five shekels of silver, and for the female thy estimation shall be three shekels of silver.
7 And if it is from sixty years old and above, if it is a male, then thy estimation shall be fifteen shekels, and for the female ten shekels.
8 But if he is poorer than thy estimation, then he shall present himself before the priest, and the priest shall value him; according to the ability of the one that vowed shall the priest value him.
9 And if it is an animal which is offered unto the LORD, all that anyone gives of such unto the LORD shall be holy.
10 He shall not alter it nor change it, a good for a bad, or a bad for a good; and if he shall exchange one animal for another, then it and the one exchanged thereof shall belong to the sanctuary.
11 And if it is an unclean animal, which cannot be offered as a sacrifice unto the LORD, then he shall present the animal before the priest;
12 and the priest shall value it, whether it is good or bad; according to the estimation of the priest, so shall it be.
13 But if it must be redeemed, then they shall add a fifth part thereof unto thy estimation.
14 And when a man shall sanctify his house to be holy unto the LORD, then the priest shall value it, whether it is good or bad; as the priest shall value it, so shall it stand.