Mathematics, 10.12.2020 23:20, vso227

The owner of a hobby store bought a case of 9-volts batteries for $46.30. He marked the price up such that his profit was $3.35 per battery. Once he had sold 12 batteries the store owner had recovered his cost. How many 9-volts batteries are in the case?

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The owner of a hobby store bought a case of 9-volts batteries for $46.30. He marked the price up suc...