这道题目没看懂

lbd2006

If an organization were to sell n tickets for a theater production, the total revenue from ticket sales would be 20 percent greater than the total costs of the production.  If the organization actually sold all but 5 percent of the n tickets, the total revenue from ticket sales was what percent greater than the total costs of the production?

A) 14%

B) 10%

C) 14%

D) 15%

E) 18%

谁能帮我解释一下，这是什么意思啊？ 谢谢

xmpig

N票全卖了换来的收入比支付戏院的全部成本还要多20%；如果实际上有5%的票没卖出去，由此换来的实际收入要比前面说的戏院的全部成本多处百分之多少？