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Five boys go to a store and each buys a notebook, an eraser, and a pen. Find an expression for the total cost (in dollars) if the price of a notebook is $x, an eraser is $y, and a pen is $z.

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Five boys go to a store and each buys a notebook, an eraser, and a pen. Find an expression for the total cost (in dollars) if the price of a notebook is $x, an eraser is $y, and a pen is $z.



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