A plastic raincoat sold at 30 yuan, Taking advantage of the rain at the singing performance for bicycle riding
    

    Many people were to buy a thin plastic raincoat for bicycle riding at the price of 30 yuan at "Zhang Guorong's singing performance in Guangzhou" which was held in Tianhe Gym in Guangzhou. It is said the wholesale price of this kind of raincoats is only 2.5 yuan per price.
On the night before last, it had been raining continuously at the singing performance that lasted two and a half hours. That night, nearly all the audience who went to watch the performance carried their umbrellas in the rain. The audiences found quite a few peddlers were peddling a kind of low-grade raincoats at the price of 5 to 10 yuan.
After the audience entered the gym, the working staff kept reminding them to strictly observe the rule:" Don't open up umbrellas so as to avoid blocking other audience's view". Mean while some people peddled a kind of raincoats made by a certain factory in Shunde. Quite a lot of audiences were greatly taken aback when the peddlers quoted the price. The price of such a thin low-grade plastic raincoat ran up to 30 yuan.
That audience who couldn't take it would go outside to buy raincoats. But the staff told them not to go out, otherwise they will not be allowed to enter again. The audience has no choice and bought raincoats reluctantly at the unit price of 30 yuan. In an instant, purple and yellow raincoats spread over every corner of the sports field.
People learned afterwards that the sponsor unit of the performances that night distributed 1800 white raincoats to the audience on the sport. The raincoats were given out free of charge in order of arrival.