Question
One magazine costs $10 at a shop. During a sale, for every 6 magazines bought, the 7th magazine can be bought at a discount of 30% off the original price. How many magazines does Luis buy if he pays $489 altogether?
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One magazine costs $10 at a shop. During a sale, for every 6 magazines bought, the 7th magazine can be bought at a discount of 30% off the original price. How many magazines does Luis buy if he pays $489 altogether?