There are two kinds of ticket prices in the film and television city. Type A ticket is 7.5 yuan, and type B ticket is 5.5 yuan. There are 300 tickets for each of the two types. How much can you earn after all the tickets are sold?
影视城的票价有两种，甲种票7.5元，乙种票5.5元，两种票各有300张，全部售出后可以收入多少元？
<gadget id="calculator">7.5 * 300</gadget>
<output>2_250</output>

<gadget id="calculator">5.5 * 300</gadget>
<output>1_650</output>

<gadget id="calculator">2_250 + 1_650</gadget>
<output>3_900</output>

<result>3_900</result>