The store bought a batch of pens and decided to sell them at a price of 9.5 yuan each. 60% of the sales were sold in the first week, and at this time there was still a shortfall of 84 yuan to recover the full cost. After another week, all of them were sold, with a total profit of 372 yuan. So how much is the price for each of these pens purchased by the store?
商店购进了一批钢笔，决定以每支9.5元的价格出售．第一个星期卖出了60%，这时还差84元收回全部成本．又过了一个星期后全部售出，总共获得利润372元．那么商店购进这批钢笔的价格是每支多少元？
<gadget id="calculator">372 + 84</gadget>
<output>456</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">456 / 9.5 / (2/5)</gadget>
<output>120</output>

<gadget id="calculator">372 / 120</gadget>
<output>31/10 = around 3.1</output>

<gadget id="calculator">9.5 - (31/10)</gadget>
<output>6.4</output>

<result>6.4</result>