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OG2016 PS Practice #165.
To mail a package, the rate is x cents for the first pound and y cents for each additional pound, where x>y. Two packages weighing 3 pounds and 5 pounds, respectively, can be mailed separately or combined as one package. Which method is cheaper, and how much money is saved?
Combined, with a savings of x - y cents
Combined, with a savings of y - x cents
Combined, with a savings of x cents
Seprately, with a savings of x - y cents
Separately, with a savings of y cents

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