There are 1200 shirts of A and B in the shopping mall. After one week, 1750 shirts are sold in total. How many shirts are left?
商场里有甲、乙两种衬衣各1200件，一个星期后，共卖出了1750件，还剩下多少件？
<gadget id="calculator">1_200 * 2</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 - 1_750</gadget>
<output>650</output>

<result>650</result>