经过仔细计算，他们算出了总数。
我们的价格是经过仔细计算的，并不是漫开要价。
Our price is already narrowly calculated and it leaves ur only a small profit margin.
我方的所有价格都是经过仔细的计算并降到了极限，以这样的价格我方已经和不同国家的很多购买商做了很多的生意。
All our prices have been carefully calculated and cut to the limit, at which we have done large business with many other buyers in different countries.
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