The store sells 3 coats and 4 pairs of trousers on the first day and earns a total of 325 yuan, and sells the same 4 coats and 3 pairs of trousers on the second day and earns a total of 375 yuan. How much does each jacket cost per pair of trousers?
商店第一天卖出3件上衣和4条裤子共收入325元，第二天卖出同样的4件上衣和3条裤子共收入375元．每件上衣比每条裤子贵多少元？
<gadget id="calculator">375 - 325</gadget>
<output>50</output>

<result>50</result>