Numbers 3:47

3:47 collect ¹  five shekels for each ²  one individually; you are to collect ³  this amount ⁴  in the currency of the sanctuary shekel (this shekel is twenty gerahs). ⁵ 

Numbers 18:16

18:16 And those that must be redeemed you are to redeem when they are a month old, according to your estimation, for five shekels of silver according to the sanctuary shekel (which is twenty gerahs).

[3:47]  ¹ tn The verb again is the perfect tense in sequence; the meaning of “take” may be interpreted here with the sense of “collect.”

[3:47]  ² tn The idea is expressed simply by repetition: “take five, five, shekels according to the skull.” They were to collect five shekels for each individual.

[3:47]  ³ tn The verb form now is the imperfect of instruction or legislation.

[3:47]  ⁴ tn Heb “them,” referring to the five shekels.

[3:47]  ⁵ sn The sanctuary shekel was first mentioned in Exod 30:13. The half-shekel of Exod 38:26 would then be 10 gerahs. Consequently, the calculations would indicate that five shekels was about two ounces of silver for each person. See R. B. Y. Scott, “Weights and Measures of the Bible,” BA 22 (1951): 22-40, and “The Scale-Weights from Ophel, 1963-1964,” PEQ 97 (1965): 128-39.