Question
One novel costs $20 at a shop. During a sale, for every 6 novels bought, the 7th novel can be bought at a discount of 20% off the original price. How many novels does Billy buy if he pays $372 altogether?
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One novel costs $20 at a shop. During a sale, for every 6 novels bought, the 7th novel can be bought at a discount of 20% off the original price. How many novels does Billy buy if he pays $372 altogether?