In stock market transactions, regardless of buying or selling, you need to pay 0.3% of the transaction funds as a handling fee. A stockholder bought 3,000 shares of a certain stock at 10.65 yuan per share, and after a period of time, sold all of this stock at 13.68 yuan per share. How much did this investor earn by buying and selling this stock? (Only the column formula does not count)
股市交易中，无论买进和卖出，均需要交纳交易资金的0.3%作为手续费．某股民以每股10.65元买过某种股票3000股，过了一段时间，又以每股13.68元将这种股票全部卖出．此股民买卖这支股票赚了多少元？(只列式不计算)
<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>