Xinxing Sporting Goods Store bought a batch of basketballs this month, divided into first-class and second-class products. The purchase price of second-class products is 20% cheaper than that of first-class products. First-class products are priced at 20% profit, and second-class products are priced at 15% profit. In this way, each basketball of first-class products is 28 yuan more expensive than second-class products. How much is a first-class basketball?
新兴体育用品商店本月买进一批篮球，分一级品和二级品，二级品的进价比一级品的进价便宜20%，按优质优价的原则，在出售时，一级品按20%的利润定价，二级品按15%的利润定价，这样一级品比二级品每个篮球贵28元．一级品每个篮球多少元？
<gadget id="calculator">1.2 - 0.92</gadget>
<output>0.28</output>

<gadget id="calculator">28 / 0.28</gadget>
<output>100</output>

<result>100</result>