shopping mall bought 80 computers at a price of 5,000 yuan each, and sold them at a price of 20% in the first month. A total of 50 computers were sold, and in the second month they were all sold out at 75% of the price in the first month. How much is the total profit of these computers?
某商场按每台5000元的价格进了80台电脑，第一个月按20%利润定价出售，共卖出50台，第二个月按第一个月定价的75%全部售完．这些电脑共赢利多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5_000 * (1/5) * 50</gadget>
<output>50_000</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5_000 * (6/5) * (3/4)</gadget>
<output>4_500</output>

<gadget id="calculator">5_000 - 4_500</gadget>
<output>500</output>

<gadget id="calculator">80 - 50</gadget>
<output>30</output>

<gadget id="calculator">500 * 30</gadget>
<output>15_000</output>

<gadget id="calculator">50_000 - 15_000</gadget>
<output>35_000</output>

<result>35_000</result>