RT-Mart purchased 1,000 toys and some were damaged during transportation. After the good undamaged toys were sold out, the profit margin was 50%. The damaged toys were sold at a reduced price, resulting in a loss of 10%. After the final settlement, the store’s total profit margin was 39.2% , how many good toys are sold in the store?
大润发购进玩具1000个、运输途中破损了一些，未破损的好玩具卖完后，利润率为50%，破损的玩具降价出售，亏损了10%，最后结算，商店总的利润率为39.2%，商店卖出的好玩具有多少个？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1_000 * (1/10)</gadget>
<output>100</output>

<gadget id="calculator">39.2 / 100</gadget>
<output>0.392</output>

<gadget id="calculator">1_000 * 0.392</gadget>
<output>392</output>

<gadget id="calculator">392 - 1_000</gadget>
<output>-608</output>

<gadget id="calculator">100 + 1_000 + (-608)</gadget>
<output>492</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/10) - 1</gadget>
<output>-9/10 = around -0.9</output>

<gadget id="calculator">1 + (1/2) + (-9/10)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">492 / (3/5)</gadget>
<output>820</output>

<result>820</result>