A proposed embankment fill requires 8000 m³ of compacted soil. The void ratio of the compacted fill is specified as 0.7. Four borrow pits are available as described in the following table, which lists the respective void ratios of the soil and the cost per cubic meter for moving the soil to the proposed construction site. Make the necessary calculation to select the pit from which the soil should be brought to minimize the cost. Assume G_s to be the same at all pits.

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Borrow pit A B C C Void ratio 0.82 1.1 0.90 0.78 Cost ($/m³) 11 8 9 10