Tickets for all but 100 seats in a 10,000-seat stadium were sold. Of the tickets sold, 20% were sold at half price and the remaining tickets were sold at the full price of $2. What was the total revenue from ticket sales? Choose the most appropriate option: A) $15,840 B) $17,820 C) $18,000 D) $19,800 E) $21,780
10000 seats --&gt; Full Price : Half Price = 8000 : 2000   Price when all seats are filled = 16000 + 2000= 
<gadget id="calculator">16000 + 2000</gadget>
<output>18_000</output>
18000   100 seats are unsold --&gt; Loss due to unfilled seats= 20 + 2*80= 
<gadget id="calculator">20 + 2*80</gadget>
<output>180</output>
180   Revenue= 18000 - 180= 
<gadget id="calculator">18000 - 180</gadget>
<output>17_820</output>
17820   Answer: $17,820
<result>B</result>
Tickets for all but 100 seats in a 10,000-seat stadium were sold. Of the tickets sold, 20% were sold at half price and the remaining tickets were sold at the full price of $2. What was the total revenue from ticket sales?