A certain TV set was originally priced at 150% of the cost. Affected by the financial crisis, it now advertises "20% discount, 40 yuan fare for free delivery". As a result, each TV still makes a profit of 378 yuan. How much is the purchase price of this TV set?
某种电视机原来按成本的150%定价，受金融危机影响，现在打出"八折优惠，外送40元车费"的广告，结果每台电视机仍获利378元．这种电视机的进价是多少元？
<gadget id="calculator">40 + 378</gadget>
<output>418</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">150 / 100</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * (4/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) - 1</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(4/5) + (1/5)</gadget>
<output>1</output>

<gadget id="calculator">418 / 1</gadget>
<output>418</output>

<result>418</result>