The school bought 15 volleyballs and 23 footballs each, and the total cost was 350 yuan. 8.5 yuan per football, how much is each volleyball?
学校买来15只排球各23只足球，共用去350元．每只足球8.5元，排球每只多少元？
<gadget id="calculator">8.5 * 23</gadget>
<output>195.5</output>

<gadget id="calculator">350 - 195.5</gadget>
<output>154.5</output>

<gadget id="calculator">154.5 / 15</gadget>
<output>10.3</output>

<result>10.3</result>