Xiaoli's parents run a clothing store, and her mother sells goods in the morning, and 8 of the hot-selling dresses are sold at a 15% discount. In the afternoon, Dad sells the goods. He reduces the price of this dress by 35 yuan, and sells a total of 12 pieces. Finally, he finds that the profit of the two dresses is the same. According to the original price, the profit of each piece is 45 yuan. Find the purchase price of the dress.
小丽的父母经营一个服装店，上午妈妈售货，热销中的连衣裙按八五折售出8件．下午爸爸售货，对这种连衣裙降价35元，共售出12件，最后发现两人卖连衣裙的所得利润相同，按原定价每件的利润是45元，求连衣裙的进价．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">45 * (17/20) * 8</gadget>
<output>306</output>

<gadget id="calculator">35 * 12</gadget>
<output>420</output>

<gadget id="calculator">45 * 12</gadget>
<output>540</output>

<gadget id="calculator">420 - 540</gadget>
<output>-120</output>

<gadget id="calculator">306 + (-120)</gadget>
<output>186</output>

<gadget id="calculator">(17/20) * 8</gadget>
<output>34/5 = around 6.8</output>

<gadget id="calculator">8 - (34/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">186 / (6/5)</gadget>
<output>155</output>

<gadget id="calculator">155 + 45</gadget>
<output>200</output>

<result>200</result>