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Carmela bought a new video camera that cost $1,138. She made a down payment of 25% and borrowed the rest. She repaid the loan in 18 payments of $51.60 each. How much were the interest charges on the amount she borrowed?
 Apr 12, 2012

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[input]100*( (18*51.60) / (1138 - 25% ) - 1) +"percent"[/input]
 Apr 12, 2012

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