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PHILADELPHIA (CBS) – A new survey finds parents face a dilemma when it comes to back-to-school shopping, saving either time or money.

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The parents questioned say they spend about $322 per child on back to school supplies.

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That number goes up almost $100 when the kids come along.

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But, 70 percent of those parents say they’re more efficient when they shop with their children and that back to school shopping takes less time.