stationery store bought a batch of pens and sold them at a price of 19.5 yuan each. When 56% of the pens were sold, the boss found that the full cost could be recovered by 54 yuan, so he decided to sell them at a 20% price reduction and sold them all soon. Out, the final total profit of 289.2 yuan. Question: How much is the price for each of these pens purchased by the stationery store?
一文具店购进了一批钢笔，以每支19.5元的价格出售，当卖出56%时，老板发现还差54元就能收回全部成本，于是决定降价20%销售，很快就全部售出，最终共获得利润289.2元．问：文具店购进这批钢笔的价格是每支多少元？
<gadget id="calculator">19.5 - 6.846</gadget>
<output>12.654</output>

<result>12.654</result>