张永暑假期间在表哥店里帮助表哥卖相机,其中一种相机卖310元。为了方便顾客,表哥让他把机身和机套分开卖,并告诉他,机身比机套贵300元。这天表哥出门,正好有一位顾客单买一个机套。张永想起表哥的话,就向这位顾客要价10元,可顾客说他卖贵了。张永想了想说,不贵呀,表哥走的时候就是这么交代的。可那位顾客一口咬定,他前几天就是在这家店用5元买过一个一模一样的机套。他们正在争执不下,表哥回来了,他告诉张永确实他卖贵了。张永听了表哥的话感到很不服气, Zhang Yong cousin during the summer vacation to help cousin store selling cameras, one of the cameras sold 310 yuan. In order to facilitate customers, cousin asked him to separate the fuselage and machine sets to sell, and told him that the fuselage is 300 yuan more expensive than machine sets. Cousin to go out this day, just a customer to buy a single machine case. Zhang Yong remembered cousin’s words, to the customer asking price of 10 yuan, the customer said he sold expensive. Zhang Yong wanted to say, not expensive, cousin is the time to explain it. Can the customer insisted that he a few days ago is in this shop with 5 yuan to buy a exactly the same machine sets. They are no longer in dispute, cousin came back, he told Zhang Yong really expensive. Zhang Yong heard cousin’s words feel very unconvinced,