The bookstore sells a total of 120 books A and B. Each book of type A is 5 yuan, and each book of type B is 3.75 yuan. The income of type A books is 162.5 yuan more than that of type B books. How many books of type A are sold?
书店卖出甲乙两种书共120本，甲种书每本5元，乙种书每本3.75元，卖出的甲种书比乙种书多收入162.5元，甲种书卖出多少本．
<gadget id="calculator">120 * 3.75</gadget>
<output>450</output>

<gadget id="calculator">450 + 162.5</gadget>
<output>612.5</output>

<gadget id="calculator">5 + 3.75</gadget>
<output>8.75</output>

<gadget id="calculator">612.5 / 8.75</gadget>
<output>70</output>

<result>70</result>