Leviticus 27:4

And if it [be] a female
That is, of the same age, full twenty years of age, and not more than sixty:

then thy estimation shall be thirty shekels;
about three pounds ten shillings of our money, the price of a servant, ( Exodus 21:32 ) ; the reason of this difference of estimation between a man and a woman is, because the woman is the weaker vessel, and her labour and service of less importance and worth, such as spinning, washing