The cost of two commodities, A and B, is 200 yuan. Commodity A is priced at 30% of the profit, and commodity B is priced at 25% of the profit. Later, both commodities are sold at 90% of the price, and the profit is still 27.7 yuan. Q: How much is the cost of commodity A?
甲、乙两种商品成本共200元，甲商品按30%的利润定价，乙商品按25%的利润定价，后来，两种商品都按定价的90%出售，结果仍获利润27.7元．问：甲种商品的成本是多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">200 * (9/10)</gadget>
<output>180</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">200 * (1/4) * (9/10)</gadget>
<output>45</output>

<gadget id="calculator">27.7 - 180 - 45</gadget>
<output>-197.3</output>

<gadget id="calculator">200 + (-197.3)</gadget>
<output>2.7</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) * (9/10)</gadget>
<output>27/100 = around 0.27</output>

<gadget id="calculator">(1/4) * (9/10)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">(27/100) - (9/10) - (9/40)</gadget>
<output>-171/200 = around -0.855</output>

<gadget id="calculator">(9/10) + (-171/200)</gadget>
<output>9/200 = around 0.045</output>

<gadget id="calculator">2.7 / (9/200)</gadget>
<output>60</output>

<result>60</result>