Xiaoxiao took out 2 pieces from 10 yuan, 5 yuan, 2 yuan, and 1 yuan. What is the most she can take out?
笑笑从10元、5元、2元、1元钱中拿出2张，她最多拿出多少
<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<result>15</result>