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KIDS, PARENTS, AND TEACHERS WILL LOVE THIS ECO-FRIENDLY MYSTERY! CAM JANSEN'S SCHOOL IS GOING GREEN! FOR EACH CAN OR BOTTLE CAM AND HER CLASSMATES BRING IN TO BE RECYCLED, THE SCHOOL EARNS A NICKEL. HOW MANY CANS AND BOTTLES DID THEY BRING IN? AND HOW MUCH MONEY DID THEY...

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