In stock market trading, no matter buying or selling, 0.3% of the trading capital is required as a handling fee. A stockholder bought 3,000 shares of a certain stock at 10.065 yuan, and sold it at 13.68 yuan after a while. How much money did the investor make in this stock sale?
股市交易中，无论买进和卖出均需交易资金的0.3%作为手续费．某股民以10.065元买进某种股票3000股，过了一段时间，又以13.68元卖出．此股民在这次买卖股票中赚了多少钱？
<gadget id="calculator">0.3 / 100</gadget>
<output>0.003</output>

<gadget id="calculator">1 - 0.003</gadget>
<output>0.997</output>

<gadget id="calculator">13.68 * 3_000 * 0.997</gadget>
<output>40_916.88</output>

<gadget id="calculator">1 + 0.003</gadget>
<output>1.003</output>

<gadget id="calculator">10.65 * 3_000 * 1.003</gadget>
<output>32_045.85</output>

<gadget id="calculator">40_916.88 - 32_045.85</gadget>
<output>8_871.03</output>

<result>8_871.03</result>