Two sets of sportswear, A and B, cost a total of 150 yuan. A suit is priced at 30% of the profit, and B is priced at 20% of the profit. In order to speed up sales, all are sold at a 10% discount. As a result, a total profit of 20.1 yuan was made after the sale. How much does a set of sportswear cost?
甲、乙两套运动装，成本共150元，甲套装按30%的利润定价，乙套装按20%的利润定价．为了加快销售速度，均按九折出售．结果卖出后共获利20.1元．甲套运动装的成本是多少元？
<gadget id="calculator">0.9 * 150</gadget>
<output>135</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">0.9 * (1/5) * 150</gadget>
<output>27</output>

<gadget id="calculator">20.1 - 135 - 27</gadget>
<output>-141.9</output>

<gadget id="calculator">150 + (-141.9)</gadget>
<output>8.1</output>

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

<gadget id="calculator">0.9 * (3/10)</gadget>
<output>0.27</output>

<gadget id="calculator">0.9 * (1/5)</gadget>
<output>0.18</output>

<gadget id="calculator">0.27 - 0.9 - 0.18</gadget>
<output>-0.81</output>

<gadget id="calculator">0.9 + (-0.81)</gadget>
<output>0.09</output>

<gadget id="calculator">8.1 / 0.09</gadget>
<output>90</output>

<result>90</result>