The total cost of two commodities, A and B, is 250 yuan. Commodity A is priced at 30% profit, and commodity B is priced at 20% profit. Later, at the request of the customer, the two products were sold at a discount of 10% of the price, and the profit was still 33.5 yuan. Q: How much is the cost of commodity A?
甲、乙两种商品成本共250元，甲种商品按30%的利润定价，乙种商品按20%的利润定价．后来应顾客要求，两种商品都按定价的九折出售，仍可获利33.5元．问：甲种商品的成本是多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">250 * (6/5) * (9/10)</gadget>
<output>270</output>

<gadget id="calculator">270 - 250</gadget>
<output>20</output>

<gadget id="calculator">33.5 - 20</gadget>
<output>13.5</output>

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

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">(13/10) * (9/10)</gadget>
<output>117/100 = around 1.17</output>

<gadget id="calculator">(6/5) * (9/10)</gadget>
<output>27/25 = around 1.08</output>

<gadget id="calculator">(117/100) - (27/25)</gadget>
<output>9/100 = around 0.09</output>

<gadget id="calculator">13.5 / (9/100)</gadget>
<output>150</output>

<result>150</result>