Shannon paid $57.25 for 28 pounds of potatoes. Shannon estimated the cost per pound to be $3.00. What is her error?

To estimate the cost per pound, round $57.25 to $60 and 28 pounds to 20. Then divide: $60 ÷ 20 = $3 per pound. So Shannon’s estimate of $3.00 is consistent with rounding $57.25 to $60 and 28 pounds to 20, as described in choice B.

AI-written and checked against the verified answer.