One day, my parents took Xiaobei, who was in kindergarten, to visit the zoo. The lowest fare is 3 yuan, and the highest fare is 5 yuan. The following amount of yuan may be the total purchase price of the three of them.
一天，爸妈带正在读幼儿园的小贝参观动物园．票价最低的一张是3元，票价最高的一张是5元．下列多少元可能是他们三人买的总价钱．
<gadget id="calculator">3 + 5 + 5</gadget>
<output>13</output>

<result>13</result>