Treasury of Scripture Knowledge
A shekel is
And all your valuations shall be according to the shekel of the sanctuary: twenty gerahs shall be the shekel.
You shall even take five shekels apiece individually, after the shekel of the sanctuary shall you take them: (the shekel is twenty gerahs:)
And the shekel shall be twenty gerahs: twenty shekels, five and twenty shekels, fifteen shekels, shall be your mina.