The cultural store bought 150 new notebooks, each with a purchase price of 1.25 yuan and a retail price of 1.50 yuan. How much money can you earn after selling these notebooks?
文化商店新进了150本笔记本，每本进价1.25元，零售价1.50元，卖完这些笔记本后，可以赚多少元钱？
<gadget id="calculator">1.5 - 1.25</gadget>
<output>0.25</output>

<gadget id="calculator">0.25 * 150</gadget>
<output>37.5</output>

<result>37.5</result>