67. Wendy bought CDs at $3 each and sold them at $8 each. To promote sales, all customers who bought two CDs were given one free CD. After she had sold all the CDs, Wendy made a gain of $1235 despite giving away 150 CDs to her customers. How many of Wendy's customers bought only one CD?
67. Wendy bought CDs at $3 each and sold them at $8 each. To promote sales, all customers who bought two CDs were given one free CD. After she had sold all the CDs, Wendy made a gain of $1235 despite giving away 150 CDs to her customers. How many of Wendy's customers bought only one CD?
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