Mom spent 15.5 yuan to buy books, 7.5 yuan to buy pens, and the salesperson gave me 15 yuan. How much did my mother bring?
妈妈买书用了15.5元，买钢笔用去7.5元，售货员找给了15元，妈妈带了多少元钱？
<gadget id="calculator">15.5 + 7.5 + 15</gadget>
<output>38</output>

<result>38</result>