Xiaoxiao went to the store for 40 yuan to buy a schoolbag and a pencil case. The salesperson supplied Xiaoxiao with 0.2 yuan, and each schoolbag was 32.30 yuan. How much is each pencil case?
笑笑用40元钱到商店买了1个书包和1个文具盒，售货员补给笑笑0.2元，每个书包32.30元，每个文具盒多少元？
<gadget id="calculator">49.8 - 32.3</gadget>
<output>17.5</output>

<result>17.5</result>