There are a batch of air conditioners in Generation Mall. If each unit is priced at a profit of 20% and then sold at a 20% discount, each unit will lose 128 yuan. What is the purchase price of this kind of air conditioner?
世代商城有一批空调，如果按每台20%的利润定价，然后按八折出售，每台空调反而亏损128元，这种空调的进货价是多少元？
<gadget id="calculator">1 - 0.96</gadget>
<output>0.04</output>

<gadget id="calculator">128 / 0.04</gadget>
<output>3_200</output>

<result>3_200</result>