一小段话,很难英文表达,说实话,对于我们公司来说,这是很难接受的.为了配合贵司的要求,我们还不断付出很多额外的成本,例如

To be honest with you,this is hardly acceptable to our company.In order to accommodate your company's requests,we have to continue to pay for the extra costs,such as those involved in the testing of products,in the transportation of a large quantity of samples,as well as in the improvement of packing the products,all of which have imposed a big burden on our company.

to be honest, it is hard to accept for our company, in order to satisfied the requests we have to pay more additional cost, for instance, testing costs, the transportation cost for a large number of samples and the cost of packaging improvements, we will under great pressure about those.