'Redemption price' in the Bible

As the redemption price for the 273 firstborn Israelites who outnumber the Levites,

Give the money to Aaron and his sons as the redemption price for those who are in excess among the Israelites.”

You will pay the redemption price for a month-old male according to your assessment: five shekels of silver by the standard sanctuary shekel, which is 20 gerahs.