✔ 最佳答案
This quotation has already been our best offer to you. You should understand that the costs of raw materials are increasing continuously in all countries. Further, the manufactures who supply the CV cups are less than before. As such, our quotations to the existing customers have been raised. Since you are not dealing business with us for a long time, we are pleased to offer you with such a competitive price. We do hope that you can consider our difficulties and accept our quotation.