It should be a simple problem, but I come up with 2 possible solutions. Solution a seems correct but I can't figure out why Solution b doesn't work.
36 chocolate bars each weigh 1.55 oz. The total cost of all 36 bars is $23.20. What is the price per pound.
Solution a: 36 bars divided by $23.20 equals approximately $1.55. The bars are 1.55 oz so the cost is 1$ per oz or 16$ per pound
Solution b: 36 bars multiplied by 1.55 oz equals 55.8 oz. 55.8 total oz divided by $23.20 equals $2.40 per oz or $38.40 per pound

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Both of your calculations are incorrect.

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