During the May Day, home appliance shopping malls held TV sales promotions. One of the color TVs sold at 10% off the list price could make a profit of 200 yuan, and if it was sold at 15% off the list price, it would lose 75 yuan. How much is the purchase price of this color TV?
五一节期间，家电商场举行电视机促销活动，其中的一款彩电，若按标价打九折销售可赢利200元，若按标价打八五折销售则亏损75元．这款彩电的进价是多少元？
<gadget id="calculator">200 + 75</gadget>
<output>275</output>

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

<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">(9/10) - (17/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">275 / (1/20)</gadget>
<output>5_500</output>

<gadget id="calculator">5_500 * (17/20)</gadget>
<output>4_675</output>

<gadget id="calculator">4_675 + 75</gadget>
<output>4_750</output>

<result>4_750</result>