Luzhou Great World Cinema sells a movie tonight. There are 50 VIP seats, each ticket price is 130 yuan, and 100 ordinary seats, each ticket price is 80 yuan. How many copies are there?
泸州大世界电影院今晚出售一场电影，贵宾席50个，每张票价130元，普通座100个，每张票价80元，本场收入为11900元，问这两种门票最多可以售出多少张？
<gadget id="calculator">80 * 100</gadget>
<output>8_000</output>

<gadget id="calculator">11_900 - 8_000</gadget>
<output>3_900</output>

<gadget id="calculator">3_900 / 130</gadget>
<output>30</output>

<gadget id="calculator">30 + 100</gadget>
<output>130</output>

<result>130</result>