Xiaodong spent 15.5 yuan to sell the pencil case and 50 cents to buy the eraser. How much did he spend in total?
小东卖文具盒用了15.5元，买橡皮擦用了5角钱，他一共用了多少元
<gadget id="calculator">15.5 + 0.5</gadget>
<output>16</output>

<result>16</result>