Shannon paid $57.25 for 28 pounds of potatoes. shannon estimated the cost per pound to be $3.00. what is her error?
a. shannon rounded $57.25 to $40 and 28 pounds to 20 before dividing.
b. shannon rounded $57.25 to $60 and 28 pounds to 20 before dividing.
c. shannon rounded $57.25 to $40 and 28 pounds to 30 before dividing.
d. shannon rounded $57.25 to $60 and 28 pounds to 40 before dividing.

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