如何和客户回复样品免费问题

说辞一:
Really sorry can't offer you
free samples,you know 50 USD is not negligible,and all sample fee is calculated
according to our original unit price.
真的非常抱歉无法提供你免费样品,你知道50美金是无法忽略不计的,所有的样品费我们都是按照原单价来计算的。

In fact,when our clients need samples,we also charge them sample fee,and generally the fee is twice higher(because producing samples will take more time and cost,for its small quantity).
实际上,在别的客户需要样品时,我们也会收取样品费的,而且通常是按照原单价的两倍来收取的（因为生产小数量样品需要花费更多的时间和成本）

Everyone want free samples,there are so many samples were sent out everyday,so it's really a big challenge for us to send free samples,hoping you can understand us.In fact,
I also met many clients who also want free samples,but after I told them our real situation,theyusually can understand,and willing to pay sample fee.
每个人都想样品免费,但是每天我们都会有许多样品寄出去,所以样品免费对于我们来说真的是一个很大的挑战,希望能得到你的理解,我也碰到了很多客户也是希望样品免费,但是在我解释了这一情况后,他们也都能理解,愿意支付样品费。

说辞二:

I plan to send you free samples at first,but our company rules to charge clients sample fee.
In fact,when our clients need samples,we also charge them sample fee,
and generally the fee is twice higher(you know producing samples will take more time and
cost,for its small quantity).
我原先打算为你寄送免费样品.但是我们公司规定需要收取客人样品费.实际上,在别的客户需要样品时,我们也会收取样品费的,而且通常是按照原单价的两倍来收取的（因为生产小数量样品需要花费更多的时间和成本）

From our communication,I feel you are a sincere man,
I don't want to lose such a good client like you,for the sample fee problem.
So I tried my best to strive for less sample fee with my manager,
finally he agreed all sample fee is calculated according to our original unit price.
从我们的交谈中,我感觉到你是一个真诚的客户,我们不想因为样品费这个小问题而失去你这么好的一位客人,所以我尽全力向我经理争取更少的样品费,最终他同意样品费按照我们的原单价来计算。

For showing our sincerity,we promise to return all the sample fee after you placed an order.
Hope you can understand,many thanks in advance!
为了显示我们的诚意,我们承诺在你下单后返还这部分样品费,希望你能够理解,多谢！
样品费是承担一半或者说其他的比例，自己把握就好，报样品费时就稍微报高点，或者把你自己承担的部分分摊在运费里，理由你懂的！