'Shekel' in the Bible

"When a person commits a trespass and sins by straying unintentionally from the regulations about the Lord's holy things, then he must bring his penalty for guilt to the Lord, a flawless ram from the flock, convertible into silver shekels according to the standard of the sanctuary shekel, for a guilt offering.

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.

Every conversion value must be calculated by the standard of the sanctuary shekel; twenty gerahs to the shekel.