You are to pay the redemption price for a month-old male according to your valuation: five shekels of silver, according to the sanctuary shekel, which is twenty gerahs.
Jewish Publication Society of America Version (JPS1917) - Numbers 18:16 >And their redemption-money — from a month old shalt thou redeem them — shall be, according to thy valuation, five shekels of silver, after the shekel of the sanctuary — the same is twenty gerahs.